When comparing Mozilla Thunderbird vs Mailbird 2.0, the Slant community recommends Mozilla Thunderbird for most people. In the question“What are the best e-mail clients for Windows?” Mozilla Thunderbird is ranked 1st while Mailbird 2.0 is ranked 4th.
Ranked in these QuestionsQuestion Ranking
Pro Free (as in freedom and beer)
Pro Lightning Calendar and Address Book integration
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.
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.
Pro Available on Linux, OS X and Windows
Pro Large assortment of plugins available
Mozilla Thunderbird offers a huge amount of extensions to expand the usability and options of the client.
Pro Very reliable
Version after version, Mozilla Thunderbird works as expected.
Pro Tabs for navigation
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
Pro Undo send
Pro Excellent UI/UX
The UI looks simple but is customizable. UX is also simple and easy to use.
Pro Free and paid versions
Users who only need to use the basic features of the app have a free version available, though it does limit to only 1 account. There is a paid Mailbird Pro version that does extend functionality and allows for unlimited accounts but it does cost $1.00 a month or $45.00 as a one time fee.
Pro Apps that extend functionality
Mailbird 2.0 supports separate apps that can extend the programs functionality such as Sunrise Calendar, which allows one to add multiple calendars in one view or Evernote which allows for easy not taking and sharing.
Pro Unified Inbox
This allows you to funnel all emails from all accounts into one unified folder, so you don't have to move between different accounts.
Pro Touchscreen support
Mailbird 2.0 has touchscreen support for tablets and other touch screen Windows devices which makes it easy to control no matter what kind of Windows device is being used.
Pro Attachment quick preview
Allows you to preview attachments selected in an email and hit the 'spacebar' to view them rather than having to download it and open a file.
Pro App side bar
This allows you to have one layout with your navigation bar, message list, email convos and productivity apps in view at once so you can work your email and productivity tools synchronously.
Pro Contacts manager
This allows you to easily manage all your email contacts with all critical details in one place. Create groups too. All your contacts in one place and synced with your different email contact providers.
Pro Unlimited email accounts
There is no limit to the number of email accounts you can manage from Mailbird.
Pro Email speed reader
Helps you scan through lengthy emails to get the important parts.
Pro Import feature
This allows you to easily import all your emails from your previous email client to Mailbird.
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.
Con Subject lines can (temporarily) disappear from the list
This is sporadic behavior.
Con Serious bugs
Clicking on a subject line can bring up the wrong email.
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.
Con Terrible integration with macOS
Simple things - drag/dropping pictures doesn't work, for instance.
Con No spam filter
Doesn't have spam filter.
Con Mailbird does not support moving emails between accounts
It's a disaster when you need to transfer all mails into a new account but you can't.