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Add to SafariWhen comparing Mutt vs kmail, the Slant community recommends Mutt for most people. In the question“What are the best email clients for UNIX-like systems?” Mutt is ranked 2nd while kmail is ranked 8th.
Specs
Question Ranking
Pros
Pro Terminal based
Pro Small and efficient
Pro Active development
Even though it was first released in 1995, Mutt still enjoys an active community following it and having new releases constantly.
Pro It runs inside the terminal
It doesn't display HTML email, fonts, or graphical elements.
Pro Compose mails in your favorite editor
Edit mails efficiently with an editor you already can work fluently with.
Pro Highly configurable macros
Pro Threads emails
Pro Work with regular expressions
Mails can be filtered, deleted, flagged, etc. with regular expressions which makes mail management very efficient.
Pro Proper kde intergation
Its the only graphical email client which is properly integrated into kde plasma.
Pro Has system tray icon
Good integration with plasma 5
Pro Supports POP3 and IMAP mailboxes
Cons
Con Terminal-based
It runs inside the terminal so it doesn't display HTML email, fonts, or graphical elements.
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.
Con Poor UX
The user experience of kmail is extremely poor comparison to Thunderbird or evolution on Linux.
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.
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.
Con Akonadi
Akonadi needs lot of ram
