I have used Thunderbird as an email client for years, but with the update to version 60, essential extensions are not working anymore.
The worst issue is that Thunderbird doesn't have a persistent visual indicator when new mail arrived (this has been a problem for a while, so I don't think it will be fixed). I used extensions for this until now, but they stopped working.
A mail client that doesn't tell me when I have mail is useless to me.
Because of this, I am looking for a new email client for Linux (specifically Ubuntu Mate 18.04).
- The basics: Read/Write mail, support for multiple mail accounts, IMAP support, etc
- Tray icon: It must have some sort of persistent notification that informs me of new mails (like the now non-working FireTray or MinimizeToTray Thunderbird extensions). This doesn't necessarily have to happen via tray, but I can't think of another option.
- PGP support
- Outlook compatible: It should have the ability to read Windows TNEF mails (.dat extension) (eg like the now non-working LookOut extension of Thunderbird did).
Nice to haves (the above already seems to be asking a lot, but these would be a nice bonus):
- Run under Ubuntu Mate 18.04 (if necessary I would consider switching to a different Linux distribution. )
- Email Threads: Sorting of emails into collapsible threads based on the email chain (like the Thunderbird Conversations extension ).
- Run in background: An option to minimize the program so that it doesn't take up space in the taskbar, but still notifies me of new mail (eg a minimize to tray functionality).
- Handle large emails and attachments well.
- Ability to send HTML emails.
- Ability to configure how often emails are fetched on an account basis (eg once an hour for one email address, once every 5 minutes for another).
If there are working plugins for Thunderbird that provide these abilities, that would be great as well.
I already had a look at the email-client tag, but did not find a duplicate question or an answer.