
Korvin Silver
Won't download the vast majority of my emails through IMAP, not even with no limits on size, age, and how many to download, and it happens with random messages, be it 2 years or 2 days old, seemingly randomly. I can search for them on the server if I know what I'm looking for but they're not in the inbox in this app. Happens with multiple email providers. No such issue on Desktop. The way it stands, this is unreliable
8 people found this review helpful
Mozilla Thunderbird
5 November 2026
We're sorry for the unreliability! Missing random IMAP messages often points to a corrupted local index. In Settings > [Account] > Folders, tap Inbox and select 'Clear local messages' to force a re-sync. If this persists, please use Settings > Get Help to open a support question with details so we can investigate!

Richard Manley
Well I tried! I've been using Thunderbird for about a week now. The notifications for new mail is terrible. Yes, the notifications on the phone settings are turned on, adjustments through the app have been adjusted. I don't see a push type setting only fetch so you need to open the app, pull down on the screen to refresh. I do like the app but not getting your mail in a timely matter puts this as a big NO! Sorry...
8 people found this review helpful
Mozilla Thunderbird
12 November 2026
Sorry the sync setup was frustrating! Push requires IMAP (POP3 only supports timed Fetch). Check Settings > [Account] > Fetching mail to ensure 'Push folders' is active or 'Folder poll frequency' isn't 'Never.' Also set Android battery usage to 'Unrestricted' for Thunderbird. Thanks for trying us out—we hope you'll give it another look!

O Daetsemoh
This mobile version is a disaster. I am notified about new emails hours after I receive them, if I receive them at all. I have too often had to start a sync manually. But even then, when new emails are fetched, there are no notifications. And no, I do not want to manually change settings here and there to enable something that should be enabled by default. This app is an utter disappointment..
2 people found this review helpful
Mozilla Thunderbird
12 November 2026
Sorry to hear Thunderbird let you down! Syncing and alerts are enabled by default in the app, though Android's aggressive battery optimization often delays background mail unless the OS allows it. We're working to handle these OS quirks better, and our team is happy to help troubleshoot anytime at Settings > Get Help.