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Functionality and usability issue: I use the Thunderbird for Android app as an adjunct to my desktop installation. Recently I had occasion to reply to an email in Android to one "to" recipient and needed to add two "cc" recipients, but found no way to add the cc recipients without deleting the existing cc recipients and having to input the entire (dynamic) group again, but then was also stymied by that. How best to handle this issue?

Other than that issue, the lack of desktop contacts synching, and the lack of spam filtering, Thunderbird for Android has been a huge help, so thanks to the developers for their dedication and hard work.

After fixing the view problem of my email in Thunderbird (thanks for the F8 tip!), my email stopped downloading. I have no "prompt for password" checked. There isn't a primary password checked. I've confirmed the pop outgoing email is correct with the email provider (google). I can get into it without any issues and see my emails there.

I've re-entered the password for the pop outgoing email to no avail.

I have used Thunderbird on a MacBook Pro Max M4 for a while now. It worked fine until starting last Monday. Ever since then, I have to go to 1&1/IONOS e-mail on the web to send e-mails or use my iPhone and blind copy myself. It’s a pain going back and forth.

1&1/IONOS tech support helped me make sure all settings for the outgoing server (smtp) were and are correct. Tests on both incoming and outgoing ports are successful in the Thunderbird settings, so I don't understand why my e-mails are not sending. I have no problem receiving e-mails on Thunderbird. This problem on outgoing e-mails applies to both text-only e-mails and e-mails with attachments. Screenshots are attached.

There is 17.9GB worth of data. Do I perhaps need to delete some of it? I archive old e-mails offline once a year, generally in January for the previous calendar year.

Thanks, Tim

My big computer seems to be shut out of thunderbirds but my phone still works now that I contacted spark my phone now no longer works as well. please re-enstate my thunder bird emails onto my big computer and my phone. I prefer thunderbirds than using the xtra.web page. thankyou for your time on this. Janine van Marrewijk.

I have version 153.02esr. Since two days ago I cannot reply or forward messages. It pulls up the appropriate page but there is no box to send, the space is just blank in the upper left hand corner.

And worse yet, every 10-15 seconds I receive an alert that the connection has timed out. About a year-ish or so ago, our internet provider (Cox) sold our email service to yahoo. Although I managed to get all of the accounts (cox allowed our household 5) entered so that they all *received* mail, only one was able to send mail. The other four could only receive. Also, I could not send mail from either my google/gmail address or my very ancient yahoomail address. But all could at least receive mails. All in thunderbird, Excellent. As of yesterday, only one (a previous cox address) can receive or send mail. I tried sending a test mail to all of the other addresses, and no joy. If I get onto the yahoo main site, I can sign in with password and then must receive a text, phone call or other verification. And, of course, sign out of each, then sign into another, lather, rinse, repeat. Apparently I can also use a "passkey" which appears to be an actual "thing" that I have to plug into a USB port. I don't have one of these and have no idea what it is or how to get one. Since I've been composing this request, I've gotten 6 pop-up notices that the thunderbird server to yahoo has "timed out" - this is pretty annoying! And, there's another one! I am open to suggestions! Thunderbird has been great for getting all the emails in one place. Now, not so much. Help me!

Why is Thunderbird consatntly coming up with "Authentification failure while trying to connect to server outlook.office365.com"? It never used to and would download my hotmail emails perfectly until about a month ago. This is very frustrating, I have removed my hotmail account from thunderbird and re installed it, works for ocassionally the back to same old message authentification failure. What is going on with thunderbird?153.02

For whatever reason after the lastest Thunderbird update Windstream is refusing the connection to Thunderbird email client. I have gone through all of the delete .msf files for all of the inboxes tried adjusting server settings to no avail on anything.

I succeeded in the Thunderbird transfer method described in these forums when bunging it on an old Win10 laptop. When I come to try the same on a new Win11 PC however, setting up an existing email address simply fails. I get as far, in the Set Up Your Existing Email Address page as "Configuration found at email provider" but can proceed no further as I get the message "Unable to log in at server. Probably wrong configuration, username or password" The setup on my old PC is gone now, it finally gave up the ghost, I have email on the old Win10 laptop but that's far from ideal. Additional facts: it's an ntlworld email address; there's a possibility the password may be redundant (so many of these to be found when a PC is on its last legs) How do I get it onto this Win11 PC?

I have a large number of filters, and an important email was processed to move message into a folder. but the filter had no rule that would apply to the message. all the filter criteria were based on the sender, but that email did not have that sender. the filter log shows the filter being applied anyway. I suspect the filter database is corrupted. How can I fix that? i noticed my version is slightly out of date, and I will update it, but I dont expect that would fix a corrupted filter database .

Hi everyone!

I'm trying to log into my email account on the domain example.com via SMTP. The email account is with yandex.ru. When I try to authenticate, it says the SMTP password is incorrect. I decided to try through Outlook, and it worked. What could be the issue?

After updating to 153.0.1esr(aarch64). the SEND button has disappeared. There's no way to send an email. (I can receive emails.) I am a Mac mini M2 Pro. OS 26.4.1

I cannot find a link to download a previous release of Thuderbird, which was working fine until this update.

Neither my wife nor I can access email on our respective PCs. This has been the case for four weeks. We can access email by our Android phones, but we really want to use our PCs. I've tried to resolve the problem and failed. Previous to this failure, I had an account with BT but this was transferred to EE. When I attempt to log in to my mail account, I receive the message "Could not connect ... :the connection was refused". I can also add is that in my Account settings, Outgoing Mail server I see a message "Connection to server mail.btinternet.com:465 failed."

The STAT command did not succeed. Error getting message number and sizes. Mail server pop.gmail.com responded: [SYS/PERM] Your account is not enabled for POP access. Please visit your Gmail settings page and enable your account for POP access.

Sending of a message failed because the Outgoing server (SMTP) send@xtra.co.nz failed. The server may be unavailable or is refusing SMTP connections.' This has happened irregularly over the last 2 months or so, even with a complete shutdown of all devices, power off and restarts. This is occurring in New Zealand. I have tried the suggestions from the web a few times, they have not helped