Thunderbird Community Forum

I am expecting an important e-mail and none have come through for 2 days. Can someone please fix what ever the issue is so I can receive my e-mails. My e-mail address is: [edited from public forum] @southslope.net

It started with duplicate Archive and Drafts folders...so I checked TB help, and it gave me several suggestions, including going to my Profile folder and deleting duplicate folders from there. Everything seemed fine...until I realized that suddenly TB has NO emails later than 2022! I went in to Gmail to see if I could recover them...but they're all missing there as well. In my business account--also through Gmail, but managed through my domain name--not just my Inbox, but EVERYTHING is gone. It's as if I never existed.

This is extremely upsetting: I teach and have my own business, and losing all my emails is catastrophic.

Can someone please help?

I've been able to drag emails from my old laptop to subfolders using IMAP. The folders are on the server and with my old laptop, I could drag emails from any account to any folder, regardless of which account it was created under. I started trying to do that with a new laptop and it won't let me drag the email. I have to go through the move > search for folder > select folder process. It's a pain in the butt, especially if I have a lot of emails I want to move. Since I could do it on my old laptop, I'm thinking it's some kind of setting that I have on one that I don't have on the other. I just can't figure out what I did differently on the new laptop that it won't let me drag and drop the emails where I want them.

There's a well known "window-focus bug" in MacOS 26, where clicking on a window (even the title bar) doesn’t bring that app to the front. It seems like Thunderbird is particularly susceptible to this bug, and I was kind of tolerating it in 26.1. But just today I updated to 26.2, and oddly this has made the problem worse. Is anybody else seeing this and is anybody aware of a fix? Various MacOS discussion groups recommend tweaking MacOS mission control settings, but I don't use mission control at all.

Ever since the latest update, Thunderbird (desktop) is extremely slow when connecting to imail.gmail.com. I frequently experience timeouts and authentication failures. This severely impedes my ability to send/receive email. I am running what I assume is the latest version of Windows 11 and have business class Internet with an ethernet connection. Please help!

After getting fed up with the Outlook app on windows. I decided to switch to TB. Now i can recieve my mails but can't send. I don't Use VPN and also checked if Windows Firewall is screwing things up. But those are allowed

Without the following. Unable to login to server (SMTP) smtp.office365.com with username *****@hotmail.com has failed (Translated from dutch)

These are my Settings incoming IMAP server: outlook.office365.com, 993, SSL/TLS, OAuth2 authentication, User Name = *****@hotmail.com outgoing SMTP server: smtp.office365.com, 587, STARTTLS, OAuth2 authentication, User Name = *****@hotmail.com

You seem to have addressed this topic well but not simple enough for complete non-techies like me who can really only do "Click X, then right hand click Y, then click Z" etc. Is there a noddy solution I could try? Thanks. Derek

Nach Update auf Release Kanal kein Geburtstagskalender mehr und Geburtstage werden nicht im Kalender angezeigt. Geburtstage in Kontakten vorhanden. Benutze keine Cloud und kein Google. Wie werden Geburtstage wieder im Kalender angezeigt?

Starting 2026 Comcast is moving all email over to Yahoo email. We will be able to keep our Comcast email address, but as of this writing I do not know what suffix Yahoo will add to my 2 accounts. Both of my Comcast suffixes are Comcast.net and that is how my email comes through now. I was shared a linked that I didn't from Comcast about the pending change. Will the suffix change from Comcast.net? I have attached the link that was shared with me.

I guess with your Comcast e-mail, you need to know this. Comcast e-mail is going away and users are being switched over to Yahoo e-mail sometime in 2026.

Upgrade your Comcast.net email experience to Yahoo Mail

https://www.xfinity.com/support/articles/yahoo-email-migration-overview

Optus (Australia) emails can't be sent or received by Thunderbird on my PC via my Optus wifi internet connection. I can use emails on my phone via mobile data with wifi turned off (different email client on the phone, though). Optus checked all the settings on my PC with me and they are all correct. They insist that it is a Thunderbird issue (doubtful, IMHO) and that I contact you. Is there an issue with Thunderbird connecting with Optus email? If so. is there any resolution to the issue? If not, can you confirm no problem from your end so I can get back to them (again!)

since last update my *All Mail* folder is empty but at the top it says there are 138,944 messages. I can use some filters and SOME messages appear but by far not all that should match that filter. any clues? thanks,

Thunderbird 140.6.0esr (aarch64) on a Macintosh using Tahoe 26.1

Hi, my Thunderbird calendar reminders are coming up 4 hours after the meeting.

Running Kubuntu. System locale/timezone OK, TBird set to use system time (though manually making it the same didn't help). HW Clock matches system time. Pacific/Auckland.

Tried exporting all my appointments and re-importing them - no change.

When i receive email with linkages i am getting this reply when link is used

404 Not Found

The resource you are looking for has been removed, had its name changed, or is temporarily unavailable.

We apologize for the inconvenience.

I am so glad I make regular complete backups. Version 146 is a hot mess. Highlighted subject lines flashing, folders disappearing, On the second start of Thunderbird 146 I could no longer connect to hotmail, gmail, aol, juno, yahoo, All broke. Ended wiping 146 off the computer with REVO, deleting the profiles and reinstalling 145 and recovering the profiles and messages I used with 145 from backups made 2 days ago. Running the latest version of Windows 11. No need to reply, just a fair warning.