User Agent: Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0 Steps to reproduce: If "Your Name" written with cyrilic, when you try to send message you got error "An error occurred while sending mail. The mail server responded: This user account is not authorized to send messages with the address ?UTF-8?. Please adjust your e-mail client settings and try again.. Please check the message and try again.". It is a thunderbird 12.0.1 with lavabit mail service.
(In reply to Dmitry from comment #0) From the server response, it looks like the lavabit server is not accepting UTF-8 characters in usernames.
To make sure that it's a server issue can you get us a SMTP log so we can see what the servers says. See https://wiki.mozilla.org/MailNews:Logging for documentation on creating a log.
Component: General → Networking: SMTP
Product: Thunderbird → MailNews Core
QA Contact: general → networking.smtp
(In reply to Ludovic Hirlimann [:Usul] from comment #2) > To make sure that it's a server issue can you get us a SMTP log so we can > see what the servers says. See https://wiki.mozilla.org/MailNews:Logging for > documentation on creating a log. need more information
Status: UNCONFIRMED → RESOLVED
Last Resolved: 6 years ago
Resolution: --- → INCOMPLETE
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