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4.7 star rating
0
What is the best alternative to Mu4e?
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Alpine
All
5
Experiences
Pros
3
Cons
1
Specs
Top
Pro
Extremely user-friendly
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Con
Updates are not frequent
Alpine is not updated frequently. This means that new features, bug fixes or security updates come much later than in other email clients.
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Top
Pro
Can use the built-in text editor or can be integrated with another text editor
Alpine comes with pico, a lightweight text editor which can also be used as a standalone tool. It can also be integrated with vi, vim, emacs, etc... if the user prefers to do so.
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Top
Pro
On-screen contextual help
Alpine has contextual help that can be displayed on-screen. Removing the need to consult the man pages every time you forget a command or how to do something inside it.
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Specs
Based On:
None
Default Desktop Environment:
NA
Init-System:
OpenRC
OS Family:
Linux
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35
1
Mailspring
All
19
Experiences
Pros
7
Cons
12
Top
Con
Can't use without creating a Mailspring ID
There is no need to create a third party ID for an email client. What if the Mailspring closes in the future - can't install a previously downloaded Mailspring software any more to continue using it or access your stored emails?
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Top
Pro
Great integration with Gmail
Mailspring has great integration with gmail features and tags.
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Top
Con
Slow updates and bug fixes
It takes months to fix some simple bugs. For example, they can't fix bug with notifications on mac OS from April 2019! Upd: they fixed it after 6-7 months
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Top
Pro
Neat UI
The UI is very well designed and neat.
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Top
Con
Unstable, have to keep fixing passwords
You have to keep "updating the password" because it continuously finds it hard to sync with multiple Outlook accounts.
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Top
Pro
Read receipts and link tracking
Activity tracking is built into Mailspring so you get notified as soon as contacts read your messages and can follow up appropriately.
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Top
Con
Pro subscription model
To use some features, like contact profiles and link tracking more than a few times a month, you need to pay for a Pro subscription.
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Top
Pro
CPU / battery efficient
Mailspring uses a C++ sync engine designed to be as efficient as possible, so you can leave the app running and not see your laptop battery life drain away.
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Top
Con
No addressbook
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Top
Pro
Unified inbox
Using a single inbox for all of your email accounts helps you get more done in less time. Mailspring supports every major mail provider—Gmail, iCloud, Office 365, Outlook.com, Yahoo!, and IMAP/SMTP—so you have a single, streamlined command center for all your messages.
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Top
Con
No way to see messages as plain text
And HTML is only optional.
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Top
Pro
Snoozing support
You can swipe to archive / snooze messages and specify when you'd like them to resurface in your inbox.
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Top
Con
Does not support Microsoft Exchange
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Top
Pro
Unlimited number of accounts
Only in the paid version though.
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Top
Con
Very limited user interface
No way to see the messages as a list, no way to rearrange views.
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Top
Con
No portable windows (.zip) bundle available
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Top
Con
Does not support POP
Just IMAP.
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Top
Con
Does not support multi-user installation (Windows)
But instead installs to the user's home directory.
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Top
Con
UI is sluggish (Windows)
Click and only after a tiny delay (~half second) something happens.
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338
115
gnus
All
3
Experiences
Pros
2
Cons
1
Top
Pro
Everything is customizable
Yep, really. From Outlook-mode, where Outlook-typical TOFU mails are “repaired”, up to a high-sophisticated scoring and SPAM filtering, footer lines with quotes, rules depending on the recipient, MIME formatting, boxquotes, etc.
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Top
Con
Difficult documentation
Originally a newsgroup reader, so its documentation uses Usenet terminology for everything -- which is confusing.
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Top
Pro
It supports IMAP and POP3
… but you can use DavMail to connect to Exchange server via EWS.
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21
2
Mutt
All
10
Experiences
Pros
8
Cons
1
Specs
Top
Pro
Terminal based
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Top
Con
Terminal-based
It runs inside the terminal so it doesn't display HTML email, fonts, or graphical elements.
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Top
Pro
Small and efficient
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Top
Pro
Active development
Even though it was first released in 1995, Mutt still enjoys an active community following it and having new releases constantly.
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Top
Pro
It runs inside the terminal
It doesn't display HTML email, fonts, or graphical elements.
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Top
Pro
Compose mails in your favorite editor
Edit mails efficiently with an editor you already can work fluently with.
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Top
Pro
Highly configurable macros
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Top
Pro
Threads emails
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Top
Pro
Work with regular expressions
Mails can be filtered, deleted, flagged, etc. with regular expressions which makes mail management very efficient.
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Specs
Platforms:
Windows, macOS, Linux
License:
GPLv2+
Technology:
C
Search:
Yes
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Experiences
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119
20
Claws Mail
All
17
Experiences
Pros
11
Cons
5
Specs
Top
Pro
Low resource client
Claws Mail is a low resource e-mail client that is often default in low resource Linux distributions.
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Top
Con
Blocks and freezes all the time
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Top
Pro
Open-Source
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Top
Con
Saves passwords in plain format
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Top
Pro
Has many plugins for extra functionality
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Top
Con
Too much bloat
some people dont like the simple design of slypheed so they forked it and created claws mail but it has become so bloated since itsbeginnings.
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Top
Pro
Traditional user interface
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Top
Con
Saves emails in uncompressed format
This takes more space on the HDD.
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Top
Pro
Clean interface with 5 layout variants
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Top
Con
Interface looks old and setup is not easy
The icons as well as the rest of the interface look like an application from the early 90's, with this there is also no easy setup options built in like the more modern e-mail clients.
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Top
Pro
Saves emails in uncompressed readable format
Allows one to read archived emails with a text editor.
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Top
Pro
Has very strong filters
The filters a much stronger than in thunderbird.
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Top
Pro
Saves passwords in encrypted format
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Top
Pro
Has many themes
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Top
Pro
Also supported on Windows
This makes switching the platform easier.
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Top
Pro
Good support for Google's services
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Specs
Platforms:
BSD, Linux, Mac OS, Solaris, Unix, Windows
Search:
Yes
IMAP:
Yes
POP3:
Yes
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Experiences
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256
42
Evolution
All
15
Experiences
Pros
7
Cons
7
Specs
Top
Pro
Supports exchange servers
Evolution is one of the few Linux desktop e-mail clients that's supports exchange servers.
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Top
Con
Can't choose different settings for each mail account
Settings have to applied to all mail accounts.
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Top
Pro
Great integration with Gnome environment
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Top
Con
Limited configuration options
Cannot format date as preferred.
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Top
Pro
Manages contacts, tasks, calendar and memos as well
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Top
Con
RAM heavy
Very heavy on RAM usage.
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Top
Pro
Excellent GPG support
The integration with GPG is excellent. You can sign, encrypt, decrypt, authenticate and verify GPG signatures and GPG signed/encrypted email messages. All of that is just a setting away.
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Top
Con
Poor integration in any non-GNOME desktop
It is written with GNOME in mind.
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Top
Pro
Good support for Google's services
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Top
Con
No configuration messages
Although base functions like bullets, numbered, or pre-formatted text are possible, you can't select or set the font for your messages. Not even serif or sans serif. Which is a bit spartan TBH.
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Top
Pro
Clean interface with 2 layout variants
Going to View > Preview has the option of switching between "Classical View" and "Vertical View".
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Top
Con
Can be wobbly with EWS
Don't be surprised if you have to reboot it a couple of times during a working day, because error messages are piling up (e.g. connection lost, can't sync, can't store appointment, read only). Then again, is this Evolution, or what it connects to? And since such an occasional reboot is dwarfed by the fact that MS365 seems to make full IMAP/ SMTP access (close to) impossible (nice meeting invite, THX, but when is it?), just reboot and get some work done...
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Top
Pro
HTML rendering is great
Of the many email clients available on GNU/Linux, Evolution has the best HTML renderer. It renders HTML and the entire email content exactly like it would appear on a full blown web browser. Not many email clients are capable of doing that.
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Top
Con
Only available on Linux
If you have to switch to another platform for whatever reason, you will need to search for a different email client.
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Specs
Platforms:
Linux
Search:
Yes
IMAP:
Yes
Exchange Support:
Yes
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Experiences
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298
84
Mozilla Thunderbird
All
16
Experiences
Pros
10
Cons
5
Specs
Top
Pro
Free (as in freedom and beer)
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Top
Con
Development slowed to only focus on stability and security
Mozilla Thunderbird has slowed down its development of features to only focus resources on security and stability.
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Top
Pro
Available on Linux, OS X and Windows
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Top
Con
Outdated interface
Thunderbird's interface is very outdated and unpleasant. It feels more like a Windows XP application than like a modern MacOS one.
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Top
Pro
Very reliable
Version after version, Mozilla Thunderbird works as expected.
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Top
Con
Terrible integration with macOS
Simple things - drag/dropping pictures doesn't work, for instance.
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Top
Pro
Good filtering system
Mozilla Thunderbird offers a flexible filtering system with the ability to set flags and read/unread, as well as sort/assign to new mail directories. There are also numerous plugins available to assist in the filtering.
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Top
Con
Subject lines can (temporarily) disappear from the list
This is sporadic behavior.
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Top
Pro
Large assortment of plugins available
Mozilla Thunderbird offers a huge amount of extensions to expand the usability and options of the client.
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Top
Con
Serious bugs
Clicking on a subject line can bring up the wrong email.
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Top
Pro
Great flexibility
More options and extended settings than most power users could dream of. Get it working how YOU want.
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Top
Pro
Tabs for navigation
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Top
Pro
Lightning Calendar and Address Book integration
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Top
Pro
Consistent and involving a moderate learning curve
The app design of Mozilla Thunderbird has not changed significantly since its beginning, making its learning curve almost non-existent.
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Top
Pro
Send large files easy
Install pCloud plugin for Thunderbird and your files (upto 20 GB free storage included) will be received as download links
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Specs
Platforms:
Windows, macOS, Linux
Search:
Yes
IMAP:
Yes
Exchange Support:
Yes
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Experiences
Free
854
271
Geary
All
23
Experiences
Pros
9
Cons
13
Specs
Top
Pro
Straightforward and simple UI
Setting up accounts is a simple as putting in the users e-mail address and password.
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Top
Con
No PGP
No encryption available.
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Top
Pro
Native GNOME application
It looks and works like a GNOME application should, so it Just Works™.
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Top
Con
No horizontal layout
There is no optional horizontal layout for those that want to be able to view their emails headers across the full screen.
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Top
Pro
Fast and responsive
Geary is faster than most e-mail applications, upon starting the program or even just browsing in folders.
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Top
Con
Made for Gnome 3
It may look out of place in any other desktop environment.
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Top
Pro
Beautiful UI
Everything about the look and feel of Geary is a breath of fresh air after the clunkiness and ugliness of it's competitors.
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Top
Con
No incoming message rules
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Top
Pro
Lightweight
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Top
Con
Too basic
Very Basic, cannot format date, cannot create new folders - What!!
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Top
Pro
Threaded conversations
Threaded conversations means all subsequent replies are view-able underneath the initial e-mail.
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Top
Con
Not seen as a secure app by Gmail
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Top
Pro
SQLite DB for email
It uses SQLite DB for storing email messages from all accounts in one single DB file. This makes it portable as in you can just copy one SQLite DB file and move your offline mail content to another PC/location. Also, one SQLite DB file for all messages means it is incredibly fast.
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Top
Con
No native Exchange support
Whilst possible if your Exchange server and account are using Davmail as a proxy, at the moment you can't natively add an Exchange account.
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Top
Pro
Work in background
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Top
Con
Development is pretty dead
No real development since October 2017. This should be changed from a "Con" to a "Pro" as the Librem 5 smartphone has Geary as the default email application. There is ongoing development happening as can be seen at https://gitlab.gnome.org/GNOME/geary/commits/mainline
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Top
Pro
TNEF support
Support for Outlook-specific email attachments (TNEF).
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Top
Con
No Pop3 support
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Top
Con
Bad HTML rendering
The HTML rendering of email messages is not full fledged. Some messages can appear a bit off compared to their appearance on browsers
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Top
Con
No images in HTML signatures
Whilst it is possible now to add a HTML or plain text signature per account, there is no support for per images in the signatures. This is a must for when an employer imposes a set signature with images.
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Top
Con
Its bloated
IT requires many GNOME dependencies or it will be unusable on the most non other X11-desktops
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Top
Con
No proxy support
Seems like it can't retrieve email from behind proxy.
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Specs
Platforms:
GNU/Linux
License:
LGPLv2.1
Search:
Yes
Developer:
The GNOME Project
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Experiences
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109
50
Sylpheed
All
4
Experiences
Pros
3
Cons
1
Top
Con
No encrypted mailbox
Likely hasn't been done by anyone since Calypso/Courier back in the 00's.
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Top
Pro
Reliable
No issues with stability or stuff going missing.
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Top
Pro
Comprehensive settings
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Top
Pro
Very very lightweight
It is simple and very lightweight where claws mail added a lot of bloat like themes and plugins slypheed keeps it simple.
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46
40
AfterLogic WebMail
All
15
Experiences
Pros
11
Cons
4
Top
Pro
Branding
In admin panel you can supply separate logos for login screen and for top-left corner of main interface.
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Top
Con
Horrible instructions
They don't proceed in any logical order, omit significant steps and contain useless stuff like: "Another critical part of setting up the product is configuring database settings. It's assumed that you already have a database created, fill in the connection details, press Save, then you can Create Tables."
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Top
Pro
Multilanguage, with autodetection
Interface is available in over 30 languages. WebMail attempts to determine your system language and open the interface in it.
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Top
Con
Not responsive at all
3 layers of Mail section overlying each other. Totally not supported by mobile. Very bad mobile interface.
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Top
Pro
Autorefresh
Configurable autoreload of email message list every N minutes
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Top
Con
No Unified inbox
They planned it for a while, but for now, it's still working with one account at a time.
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Top
Pro
Drag 'N Drop
Mails can be dragged into a different folder, contacts can be added into group, events in calendars can be tossed around, etc. - all with drag 'n drop.
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Top
Con
No CardDAV support in free version
CardDav Sync is not available in AfterLogic WebMail Lite, which is the free version.
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Top
Pro
Mobile version of interface
Open WebMail on your iOS or Android device to get a simplified mobile interface. And when run on iOS, it'll offer you to get iOS profile with settings for mail access, contacts and calendar sync.
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Top
Pro
Plugins infrastructure
A few dozens of plugins, some of those created by community. Plugins are placed into data directory so they survive upgrades easily.
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Top
Pro
External services integration
Twitter, Facebook, Google and Dropbox are supported. With last two, you can access their file storage; and you can use social account credentials to log into your WebMail acct.
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Top
Pro
Sync with Windows, iOS, Android, etc.
Offers syncing through DAV with mobile devices, there are also mobile apps and Windows sync client.
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Top
Pro
Multiple accounts
In WebMail Pro each user can have multiple accounts added to switch between them and use them separately.
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Pro
Available in multiple editions
In addition to commercial WebMail Pro, simplified free opensource WebMail Lite is available. Also there are MailSuite Pro (which is basically WebMail Pro integrated with mailserver software) and Aurora, extended with groupware features.
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Top
Pro
Simple
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32
5
Wanderlust
All
5
Experiences
Pros
4
Cons
1
Top
Pro
Nice UI
Has enough UI polish to make day-to-day use bearable. Shows nested folders, threaded conversations and Face/X-Face headers etc. It also has decent keybindings.
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Top
Con
Freezes Emacs when checking for new mail
From mihai.bazon.net: Because Elisp is not a multithreaded language, it kind of freezes while checking for new mail. This can be bad if you're using the same Emacs instance for other purposes, like, writing code. :-) Not the case for me—I don't mind starting a new Emacs instance especially for WL; until one week ago I was using Thunderbird, which needs tons of RAM. Emacs is a lot lighter.
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Top
Pro
Fantastic IMAP support
The key differentiator for Wanderlust is it's reliable and fast IMAP support. It also supports a wide range of other protocols: NNTP POP(POP3/APOP) MH Maildir
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Top
Pro
Integrates nicely with existing Emacs packages
From mihai.bazon.net: I'm currently using it with BBDB (for keeping my address book), Flyspell (spell checking as you type), Mailcrypt (digital signatures and encryption, here's my public key btw). Can be integrated with Bogofilter, SpamAssassin, and probably whatever you want for spam filtering.
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Pro
Customizable with Lisp
The implementation is in elisp only, but allows you to customize the client in any way you wish.
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16
3
RainLoop
All
30
Experiences
Pros
17
Cons
13
Top
Con
Abandoned
Use Snappymail instead which replaces this. It is bad to be recommending RainLoop in 2023
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Top
Pro
Two-factor authentication
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Top
Con
Lack of API documentation
Most "closed" open source ever seen.
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Top
Pro
No database backend (except for contacts)
Except for contacts (which are optional), RainLoop does not require a database to run, allowing for easier management and configuration.
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Top
Con
Very little bug fixes
Bugs aren't getting fixed.
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Top
Pro
Easy to apply your own branding
Not only can you change the title, description and logo with a simple form in the admin panel, you can also completely customize the look of the login screen by supplying your own custom stylesheet.
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Top
Con
Small community
No community forums, etc. This makes it difficult to find community help or just discuss techniques.
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Top
Pro
Good UI
Good UI make it a pleasing experience
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Top
Con
Lack of documentation on plugin development
RainLoop sends the user to a plugin example that is nonexistent (which they state will be filled in later), which means the user has to figure out what the process is on their own.
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Top
Pro
Free for personal and non-profit use
RainLoop is licensed under Creative Commons. Commercial use costs $85/yr.
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Top
Con
Slow development
As of writing, the last update is quite a while ago. New features/security is not updated regularly
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Top
Pro
Client-side OpenPGP
RainLoop supports an easy to use client-side OpenPGP encryption. It allows setting up, importing and generating keys from the admin panel. OpenPGP keys are stored in the browser's local storage.
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Top
Con
Too many js and ajax calls
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Top
Pro
Easy to update
RainLoop can be updated from the admin panel. It does not require manually downloading, overwriting or configuring anything with each update.
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Top
Con
Lack of documentation
Wiki is almost blank and no real installation instructions.
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Top
Pro
Social network authentication
RainLoop integrates with Facebook, Google, and Twitter for authentication. You can find out how to set up each of the services here.
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Top
Con
Free version very limited
You can't change nothing with free version. Neither add your image logo on login screen. You can't change the templates, can't change the form to send mail.
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Top
Pro
Configurable multi-level caching system
RainLoop caches messages to allow quicker access to your mailbox and to alleviate the strain put on the server. You can choose to disable it completely if you don't want it. Or, you can configure cache settings such as an additional caching key, browser-level cache, caching message user IDs while searching, etc. Even changing memcache hosts and ports and caching system data is possible.
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Top
Con
Questionable start
The developer created RainLoop while working at AfterLogic. You can read more about it here.
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Top
Pro
Add multiple accounts
You can add multiple accounts and switch between them.
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Top
Con
No unified account view
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Top
Pro
Keyboard shortcuts
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Top
Con
Security
Missing .htaccess file for the data folder.
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Top
Pro
Dropbox integration
RainLoop allows attaching files from Dropbox. To enable this feature, go to Dropbox's developer apps page to register your app. You'll receive the app key value to enter in the admin panel.
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Top
Con
Raises security concerns since it's written in PHP
The language itself and the library ecosystem has a bad security track record.
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Top
Pro
Drag & drop support
RainLoop supports attaching files simply by dragging and dropping them in.
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Top
Pro
Multilingual
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Pro
Plugin support
RainLoop has an easy to use plugin system. You can find the full list of plugins in the admin panel (or see their code on GitHub). From the admin panel, you can, in a simple, user-friendly way, manage them - install, uninstall, update. Unfortunately, a number of plugins and the related documentation, currently, is somewhat lacking.
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Pro
Google Drive integration
You can integrate Google Drive via API-Key for selecting attachments.
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Pro
RainLoop plus Xeams
Complimented modern user interface to deliver mail from Xeams. Setting up both applications takes less than an hour on private server.
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239
56
kmail
All
9
Experiences
Pros
3
Cons
5
Specs
Top
Con
Buggy as of 2020
There are many bugs which are hard to track down in kmail, sometimes without any useful logs for troubleshooting. Sometimes the bugs are related to supportive applications like Akonadi, ect.
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Top
Pro
Proper kde intergation
Its the only graphical email client which is properly integrated into kde plasma.
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Top
Con
Poor UX
The user experience of kmail is extremely poor comparison to Thunderbird or evolution on Linux.
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Top
Pro
Has system tray icon
Good integration with plasma 5
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Con
Buggy related kdepim applications
kmail by itself isn't the only application which is buggy, the many of the kdepim applications are buggy as of spring 2020.
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Top
Pro
Supports POP3 and IMAP mailboxes
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Top
Con
No google support
You cant pass google 'Authentication' for the majority of the kdepim applications, The only support which works is via the kde 'online accounts' under 'system settings'. This only supports youtube and google hangouts integration.
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Con
Akonadi
Akonadi needs lot of ram
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Specs
Platforms:
Linux, Windows
Default Desktop Environment:
KDE Plasma
Search:
yes
Release Schedule:
yes
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15
6
SOGo
All
5
Experiences
Pros
5
Top
Pro
Drag and drop interface
Folders, contacts and events can be moved around with intuitive drag and drop functionality.
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Pro
Calendaring and messaging data can be accessed via web and multiple desktop and mobile clients
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Top
Pro
Microsoft ActiveSync support
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Pro
Localized
Available in 30 languages.
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Pro
Fully responsive
The UI is fully responsive, and works fine on desktop, tablets and phones.
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36
16
Squirrelmail
All
3
Experiences
Pros
2
Cons
1
Top
Pro
Very mature
Squirrelmail has been around for a long time.
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Top
Con
Very old
Squirrelmail has been around for a loooooong time!
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Top
Pro
Has many available plugins
Can do things like change Linux user passwords, configure vacation "out of office" messages, configure procmail .forward files, etc.
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19
11
Mailpile
All
10
Experiences
Pros
10
Top
Pro
Beautiful UI
Uncluttered, highly intuitive, easy to use user interface.
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Pro
Built-in rock-solid and easy-to-use encryption
Mailpile offers support for OpenPGP and S/MIME encryption and signatures in an easy to use manner.
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Top
Pro
Theme support
The underlying architecture of Mailpile allows for themes that not only change the visual aesthetic of the client, but layout as well allowing for different UX designs.
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Top
Pro
Secure
Encryption is turned on by default.
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Pro
Portable
The whole webmail client can be carried around on your external device (such as a USB stick) and used without having admin access to install.
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Top
Pro
Free and open source
Licensed under AGPL.
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Top
Pro
Good documentation
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Top
Pro
Fast, scalable search engine
The search engine is at the very center of Mailpile. It was specifically designed to be able to handle large amount of e-mails without grinding the machine to a halt. Additionally, the search includes a tagging feature that can automatically organize new mail by set rules or bayesian classifiers.
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Pro
Plugin architecture
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Pro
Internationalization support
Mailpile is available in over 40 languages.
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64
34
Kontact
All
20
Experiences
Pros
17
Cons
2
Specs
Top
Pro
Multi-account, multi-identity
Supports both multiple accounts from different servers / services simultaneously (both inbound and sending) as well as multiple identities. Incoming accounts have a default identity and it switches automatically to the correct identity depending on the mail folder you are in.
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Con
Crashes frequently
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Pro
Integrated calendaring
The integrated calendaring support means that incoming invitations can be accepted with a click and they get put into your calendar automatically.
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Con
Akonadi
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Pro
Supports multiple groupware servers and services
Besides being able to connect to any IMAP, POP3 and SMTP server, you can also connect your Google and Facebook accounts and access Kolab and Tine servers natively.
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Pro
Encryption
Fully supports PGP and S-MIME with built-in certificate management. Encrypt, sign and verify emails easily and securely.
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Pro
Built-in search
Searching for emails is simple with the search box in the main window which can scan through email bodies, email flags, recipients, etc. Lightening fast in recent versions.
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Pro
Plain text and HTML mail editing
Provides support for rich-text (HTML) mail editing, but kindly defaults to plain text. Also supports viewing HTML emails with several security features built-in.
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Pro
Contacts, Todos, Notes, Journals, Feeds ....
There are numerous components that come with Kontact that augment the mail experience including contact management, todo lists, note takers and an RSS feed reader, among others.
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Pro
Integration with kde plasma
Based on qt, and part of plasma suite, it integrates well with other KDE apps like kwallet, calendar, etc.
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Pro
Continuous, active development
Kontact has been actively developed for over a decade, with components such as the mail and calender going back even further. Development continues to this day with an active and responsive open source community made up of both volunteers and paid developers behind it.
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Pro
Solid offline IMAP
IMAP support is a strong point for Kontact, with offline mail and sync being transparent and automatic. Read and create mails on the go and everything syncs quickly and reliably when network connectivity is available.
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Pro
Spam, scam and adblock features
Supports spam filtering, scam detection and adblock for HTML mails.
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Pro
Keyboard friendly
Can be driven almost entirely from the keyboard. Moving an email, for instance, is a simple matter of hitting 'm' and then typing to filter through the list of folders that appears.
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Pro
Cross-platform
Works on Linux/BSD (all desktop environments and window managers), Windows and Mac.
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Pro
Threading
Has flexible and powerful options, from "traditional" conversation-style threading to organizing by date, by senders and receivers, .... paired with "keep replies in same folder" it is easy to track conversations over time.
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Pro
Filtering
Supports client and server-side filtering of mails by subject, recipients, mailing list, body text, etc.
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Pro
Very flexible user interface
You can make the Kontact UI look and function how you want. You can re-arrange the main interface, as well as make the list of mails show or hide almost anything you could need.
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Pro
Professional support
For enterprise deployments, having commercial support can be a big plus. Companies such as Kolab Systems provide professional support and consulting services for Kontact.
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Specs
Platforms:
Linux
Search:
Yes
IMAP:
Yes
POP3:
Yes
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Experiences
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51
30
Hiri
All
7
Experiences
Pros
1
Cons
5
Specs
Top
Con
Dead product
No release in well over a year, no support, and a permanent "never to be repeated" offer. This product is now looking like a con itself.
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Pro
Simple and modern UI/UX design
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Con
Not free
You have to subscribe to a paid plan to use it.
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Con
Cannot unsubscribe or cancel service
Cancellation requests go unanswered but the yearly invoices continue to arrive and credit card is charged.
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Con
No POP3 support
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Con
No IMAP support, only for Microsoft Exchange
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Specs
Platforms:
Linux, Windows, Mac
Search:
Yes
IMAP:
No
Exchange Support:
Yes
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Experiences
$5/M or 39$/Y
48
33
Zimbra Web Client
All
3
Experiences
Pros
1
Cons
2
Top
Pro
Full-featured collaboration solution
If you are looking for an alternative to Gmail, look no further than Zimbra. While not a complete document solution it does have some document features as well.
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Con
Heavy and monolithic
Zimbra doesn't much work with its host platform as much as it brings its own copies of utilities. If you want something small and "plays well with others" integratable...this is not it. Too heavy to run on a RaspberryPi if you're looking for something for just a few users.
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Con
Linux only
There is no installator for Windows
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