
Mat
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It just decided to stop syncing both ways after an update one day. If I delete an email on my desktop client then it deletes it here, but if I delete it here then it does nothing on the desktop client. Even though I haven't changed any settings I went through everything again and all syncing controls are turned on. Oh, also whoever messed with the slide left or right function messed it app up. It's super temperamental now and it used to be perfect.
Mozilla Thunderbird
October 16, 2025
We're so sorry and this may be related to an IMAP issue in the recent release. Please go to Settings > [account] > Fetching mail > incoming server and uncheck "Auto-detect IMAP namespace" and leave the IMAP path prefix empty to see if this fixes it. We are working right now on a more permanent fix, along with for the swipe gestures!

Frostwind
I am incredibly upset that I keep getting a permanent notification about missing permissions to schedule alarms. If I don't want the app to do that, then I don't want to give it permission. Given the open-source nature of the program, it is very frustrating that this happens. The desktop version is wonderful on Linux, but fairly limited on mobile for some reason. At least don't bug users for permissions they do not want to give the app. It isn't a feature I use.
27 people found this review helpful
Mozilla Thunderbird
September 3, 2025
We're sorry for any frustration with the permissions, and our system works this way as an additional layer of privacy protection on Android, bypassing many Google services. To avoid this, using polling which pulls email at a regular interval would probably the best option. We hope this helps explain our development choices!

David
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Android native back button doesn't exit the app. updating to 3 starts, pending update - developer responded promptly. Update for Devs: the back button seems to not work after going into junk, using it to back into the inbox, then trying to exit the app. it back out of junk, but not the app. Update Oct 2025: still has the problems reported over a month ago, and now more. Just found out that I can't even forward an email anymore.
4 people found this review helpful
Mozilla Thunderbird
October 8, 2025
Oh no, we're sorry to hear you're having issues forwarding messages. At the bottom of the email, does it say anything like 'Download complete message?' Are there any error codes that pop up, or does it just not forward? Is this limited to one provider or all your accounts?