Thunderbird Support Forum

When attempting to add a second email address to Thunderbird, I get the same error message every time. I have tried updating TB and restarting my computer, here are the steps I follow, please let me know if I should include any diagnostic logs/how to get them as well.

Please note that I already have an account set up that actively works, both sending and receiving gmail. Settings > Account Settings > Account Actions > Add Mail Account Enter my full name, and email address, but leave the password field blank according to other advice on this forum, although I have also tried with entering the address. Press Continue, receive the "Configuration found in Mozilla ISP database." message. Select IMAP > Done. See a google sign in page, with my email already filled in. Select Next. Then I get a Google 400 error page, reading: "400. That’s an error. The server cannot process the request because it is malformed. It should not be retried. That’s all we know." If I close that popup window, there is now a message in Thunderbird saying "Unable to log in at server. Probably wrong configuration, username or password."

Images with more details are attached below, note that this issue persists after both an update and a restart. Please ask any questions that can help you help me. Thanks in advance.

When trying to retried incoming messages, I keep getting popup that ask for my password. I tried to use the hidden password in the app, which till now has always worked, but get the following message:

"Sending of password for user (parrotdise13@att.net) did not succeed. Mail Server inbound.att.net responded [SYS/TEMP] server error - please try again later."

I have browser access to my att/yahoo parrotdise13@att.net account after changing my password. But entering the new password in the above mentioned popup produces same result.

Thanks, John B.

Overnight, I suddenly cannot send emails. I keep getting an error code AUP #OUT-1500 that says: "The email address you are sending as must match the email address you used to auth. " But I have changed nothing. Everything worked fine Thursday when I went to bed; got up Friday unable to send. I can receive all day. And I can send using my provider's website, but I'd rather use Thunderbird as usual. What the heck just happened? None of the Support suggestions work. Thanks for any wisdom you can impart!

On startup TB pops an error box up saying ' There is no email program associated to perform this action'. When dismissed TB continues to open normally. No other errors seen during operation.

I have checked my Win 10 Control Panel Apps options. TB is the email default. MailTo, file type .eml and all other settings I can see are set to TB as well.

Hi I am getting on a daily basis Thunderbird Not Responding, so I have to start Task Manager to close the program and the open it up again. I like this program but this issue is now on a daily basis and has been like this for a couple of weeks now. Kind regards Jim M

I have been using Thunderbird for years with ATT POP3 email. For some reason, it stopped receiving and sending emails yesterday. I keep receiving the error message, "Sending of password for user XXX@swbell.net did not succeed. Mail Server inbound.att.net responded: [SYS/TEMP] Server error - Please try again later." My email is still working when I login to the website. I have tried changing the password and that did not work. Please help.

On Linux, closing Thunderbird also closes Firefox if Firefox was initially opened via clicking a link in Thunderbird. I don't know if this would qualify as a bug, but is there a way to have the Firefox process start independent of Thunderbird when, for example, clicking a link in an email? I'm running 115.12.0 (64-bit) at the moment, but it happens on previous versions as well.

I just spent an hour on the phone with att and they say the problem is not theirs since I can access my account via the web interface.

Thunderbird keeps giving me this message when trying to access my email (Yahoo/AT&T). I have two email addresses with them and they both respond the same as below.

Error with account MyPrimaryBellsouthAccount Sending of password for user jarinker@bellsouth.net did not succeed. Mail server inbound.att.net responded: [SYS/TEMP] Server error - Please try again later.

I takes about 5 minutes to return this error on start up on when I use PF5 to manually check the mail.

My wife also has a bellsouth account she accesses via Thunderbird and it works fine on her laptop. So, I kind of think that rules out a home network issue.

I have some feeling that something somewhere has become corrupted in Thunderbird, but I am not sure what.

I read through the previous discussion on this issue since I am suffering from the same issue of links not working as expected. I regularly need to forward messages which include links and none of the suggestions mentioned worked for me, and I do not recall this being a problem in the past.

I currently run Thunderbird 115.11.0 on Linux Mint 21.3 Cinnamon & have been using Thunderbird as my primary Email package for many years across multiple computers.

The work around is to to copy any email that is to be forwarded to the Drafts folder. Links are preserved and the message can then be edited as required and sent complete with the embedded links.

Hope this helps others who have the same problem.

Hello, since May I have not been able to archive messages on the @wp.pl account by years and month. The archive button does not work, and when it does work, the message goes to the general archive directory. I don't know how to fix it, please help.

I have tried multiple times to add an email account to thunderbird in windows but I keep getting the error, "Unable to log in at server...". I know the details are correct as I'm copying and pasting them from my password manager so I'm not sure what the problem is.

I have 2 windows 10 computers both with Thunderbird. One computer never has trouble with getting emails. The other shows every day "Login to server mail.hoster905.com with username cnc@lcgnm.com failed" I have reset this one password at the server, entered the new password in Thunderbird and can the get mail. That day only. Next day same problem.

Since Thunderbird updated to 115.11.1 (64-bit), , the DEL key no longer deletes messages from within the message window. It DOES still delete the messages from within the message list. Any ideas as to why?

Thunderbird has suddenly stopped pulling in email, please help. It just says 'Checking mail server capabilities'. I have changed no settings at all. Webmail works. Email on my phone works. So it's not the ISP or the server or anything like that. It's just on Thunderbird where I can't do anything, but I've not changed anything so I don't understand.

When I try to send email it fails and says: Sending of the message failed. Unable to communicate securely with peer: requested domain name does not match the server’s certificate. The configuration related to mail.mandyhaggith.net must be corrected.

So please can you tell me how to correct the configuration?

Thank you for any help you can offer.

Best wishes Mandy

v115.10.1 I made a mistake setting SMTP credentials, wrong protocol, and it just stays on Sending dialog. So I abort when I realize I made a mistake and come back to mail I was to send. - but 30-60s after I aborted comes an error message saying it timed out

So the cancel button does not really cancel the send attempt, it seems.

Not sure where to report bugs, so do it here. Thanks.

So I just changed hosting companies and now I can't access ANY of my emails in Thunderbird to change my incoming and outgoing server settings because the failed login messages keep coming up so fast I can't get past them. I can't be the only one who's ever had this happen. Is there a workaround?

Hello We are trying to set up an email client Mozilla Thunderbird, but nothing works, because the email client does not have enough fields that are specified by the provider, here is a letter from them:

Hello,

Your SparkPost account is configured correctly. I recommend contacting Mozilla Thunderbird support to see where you can enter the required fields in their SMTP client to connect to SparkPost. You can see the full client configuration steps here: https://developers.sparkpost.com/api/smtp/

They should be able to prove the steps to get these settings configured in their SMTP client.

Please let me know if you have any questions; I will gladly help!