Who do you think owns the server that is giving the error (Hint not Thunderbird or Mozilla) but they sent you here. Great customer service they have, or is great customer service training.

I am truly tired of the US approach to internet. Offer free support to get customers in and then do such an appalling a job of it so people go somewhere else for support. v Extra points if you try and blame someone else. I guess in makes money for them because I don't see things getting better in the last decade or so.

So you will need to provide the error message, verbatim, so we can try and work out what it is group have managed to snaffu this time.

See you know more than I do because they told you blocks of emails are being updated? from what? to what? I have seen a few posts in the forum in the past week about SBCglobal mail, and no doubt whatever these folk are doing is breaking something. But unless you can tell us more we really are just in the dark.

Hi,

  The error message is Sending of password for user rsgreenscene@sbcglobal.net did not succeed. Mail server inbound.att.net responded: [SYS/TEMP] Server error - Please try again later

  Still not receiving my messages.

Rex

Are you using the account password in TB or a secure mail key? It will only work with a key.

https://www.att.com/support/article/dsl-high-speed/KM1010523/

I have tried the secure key but I get this message: Sending of the message failed. Unable to authenticate to Outgoing server (SMTP) outbound.att.net. Please check the password and verify the 'Authentication method' in 'Account Settings | Outgoing server (SMTP)'.

I think Yahoo is blocking my access. Please fix this.

Do you have the correct server settings for outbound.att.net, as in the link above? If you do, remove the entries for the account from Saved Passwords in Settings/Privacy & Security, restart TB, enter the secure key when asked for a password.

I checked my passwords and discovered that this particular email account had no passwords for either inbound or outbound messages. Thus, there was nothing to remove. I requested my inbound messages, entered the secure key, and I still received the same server error message. Are there any other actions I might take?

What do you have for the incoming POP server? The settings should be: inbound.att.net, 995, SSL/TLS, normal password, User Name = email address. What's the antivirus, and is a VPN in use?

Those are the settings I am using. No VPN. Antivirus is McAfee.

Suggest you run Windows in safe mode to test for interference from startup apps like antivirus. McAfee has a long history of incompatibility with TB.