When comparing Mailpile vs AfterLogic WebMail, the Slant community recommends Mailpile for most people. In the question“What are the best self-hosted webmail clients?” Mailpile is ranked 3rd while AfterLogic WebMail is ranked 5th. The most important reason people chose Mailpile is:
Mailpile is in beta so it is definitely not production ready.
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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.
Pro Free and open source
Licensed under AGPL.
Pro Beautiful UI
Uncluttered, highly intuitive, easy to use user interface.
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.
Pro Good documentation
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.
Pro Plugin architecture
Pro Internationalization support
Mailpile is available in over 40 languages.
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.
In admin panel you can supply separate logos for login screen and for top-left corner of main interface.
Configurable autoreload of email message list every N minutes
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.
Pro Multilanguage, with autodetection
Interface is available in over 30 languages. WebMail attempts to determine your system language and open the interface in it.
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.
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.
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.
Pro Sync with Windows, iOS, Android etc.
Offers syncing through DAV with mobile devices, there are also mobile apps and Windows sync client.
Pro Multiple accounts
In WebMail Pro each user can have multiple accounts added to switch between them and use them separately.
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.
Con It is actually more of an email client with a web interface than a complete solution with mail in a cloud
You need access to the device you install it on. So it is not really 'webmail'.
Con No Unified inbox
I think they planned it for a while, but for now, it's still working with one account at a time.
Con No CardDAV support in free version
CardDav Sync is not available in AfterLogic WebMail Lite, which is the free version.