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  • 2 replies
  • 1 has this problem
  • Last reply by Toad-Hall

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I have used Thunderbird for years, and I am currently on the latest version 78.7.1 (32 bit). I have 2 email accounts in Thunderbird. My personal email address has suddenly stopped sending and receiving emails (the last one received was on 9:22 on 2/4/21). I can login to my email through a web browser and check it fine but just not through Thunderbird. When I try to check emails I get a popup error message saying:

Sending of password for user did not succeed. Mail server responded: Server error - Please try again later.

I contacted AT&T about the issue and they reviewed the setting with me for both inbound and outbound and said everything was correct (servers, ports, ssl, etc etc) and that I needed to contact support for the email program.

Similarly I am having a problem with my business email which is a webmail email for my company's domain. I can send and receive messages but when I send some message it gives me an error saying it could not save a copy of the email in my sent folder and it give me the option to save it in a local folder instead of the sent folder for the email account. I need to keep records of all my sent emails so this is an issue for me. I should note that it is not doing this on every email but random ones, particularly ones that I have an attachment to the email.

I have hit a brick wall trying to solve both of these issues and any help is greatly appreciated. Thanks, John

Modified by johnamartin

All Replies (2)

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Did the AT&T tell you about their recent change in Authentication Method and the necessity to use a Secure Mail key?

server settings:

You need to create a 'Secure Mail Key' as per instructions at link.

Then use that 'Secure Mail Key' instead of the normal password in Thunderbird.

Remove stored password in Thunderbird Restart Thunderbird then enter that 'Secure Mail Key' at the password prompt.


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re : problem saving when..... not doing this on every email but random ones, particularly ones that I have an attachment to the email.

If you have an Anti-Virus product scanning outgoing emails, then it is possible it causing the problem. Suggest you do not have AV scanning emails.


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