Outgoing message failure
An error occurred while sending mail. The mail server responded: Request failed: Mailbox unavailable-verify address. Address is okay. This seems to be covered in several… (kàsi)
An error occurred while sending mail. The mail server responded: Request failed: Mailbox unavailable-verify address. Address is okay.
This seems to be covered in several archived cases. Solution being to change name of outgoing SMTP server. so that each account is associated with a different SMTP server. I have three yahoo accounts. One is legacy AT&T. No issue at this time Cannot send on Acct B. It has all account settings same as account A. When I attempt to change SMTP outgoing server on account B to the newly named SMTP server It chanes both accounts to new name, Sets new name as default and account B is still unable to send.
This is a new problem. Been a Tbird user since it's inception. V128.3 Windows 10 up to date