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Thunderbird couldn't connect to ATT/yahoo mail with the error "Sending of username did not succeed. Mail server inbound.att.net responded: Unsupported SASL mechanism." I am totally unfamiliar with this issue but know it involves an encrypted password. A net search so far is of little help though I did run into a statement that windows doesn't have this issue. I use linux and searching my package manager I find quite a few SASL mechanism plugins (who knew?) but no way to differentiate any. ATT's site is useless. Is anyone here familiar with this problem? In the meantime, I see 1 called login mechanism plugin - no, thats deprecated of course, says use the plain one so its that one for me. Tnx...

How can I move emails within Thunderbird? I want to move emails from the Sent folder of my old email account to the Sent Folder of my current email account. Emails don't move when I right-click on them and select "Move to" and then select the destination folder. All that happens is that the Thunderbird status bar reports: "Looking up pop...." "Connecting to pop..." "Connected to pop..." "Checking mail server capabilities."

We have Thunderbird set up to auto-connect to Plusnet's "Force9" emails, using a saved password, on a desktop machine running on Mint. It's always worked fine until today, when it gets to "Host contacted, sending log-in information"

then after a long pause a box pops up with,
"sending of password for user [ xxxx] did not succeed. "

It offers me the option of entering our password manually, which gets the same result.

If we log in on Firefox via their webmail portal, using the same password, it opens well enough, it's just much more clunky and slow to use than Thunderbird normally is.

Any advice will be welcome, please. Thanks.

how do i reload all firefox windows after vpn has trouble reconnecting. the image shows all of the "server not found" after the vpn has trouble reconnecting to another server location. thank you

Hi,

I use Thunderbird as my e-mail client and have been saving e-mails from the inbox into a shared folder on my internal server for many years now. Normally, when I double click to open an e-mail saved into the shared folder, the e-mail will open in Thunderbird and I can click reply, forward, etc. However, since June 17, 2025, whenever I open these e-mails saved in the shared folder, only the subject of the email and two rows of menu bars (i.e., File, Edit, View, Get Messages, Write, Tag, etc.) appear, but the contents of the e-mail do not, including sender information. I've attached a screenshot so you can see what I mean (ignore the black background which I have set). Even though I can click "Messages" --> "Reply" in the menu bar, the composition window that pops up does not show any details of the e-mail I am responding to. However, if I transfer the e-mail file from the shared folder on the internal server to anywhere in my computer, say, the Desktop, the file will open normally in Thunderbird and display all contents normally. Would appreciate it if anyone could help me figure out how to solve this problem. My colleagues and I all need access to these e-mails saved in the shared folder so we can't keep saving them on to our computers. Thanks so much!

I exported up my Thunderbird data to an external hard drive from my PC in Croatia which I have been using there for the past year.

I am in South Africa now for a few months and imported the data to my laptop with a new Thunderbird installation.

I have 5 email accounts on one domain, and 1 on another domain.

When I checked for new mail, I was asked for passwords for the 5 accounts on the one domain, and after entering this, the new emails came through fine.

However the one email account on the other domain did not ask for a password, and when I connect I get a message: "Connection to server xxx@xxx.com was reset" I can send emails with this account, but cannot receive any.

Interestingly, I have a previous installation on a desktop PC here in South Africa with the same email accounts. I tried that specific email account and it connects perfectly. The settings are exactly the same.

How do I solve this on my laptop?