После очередного обновления Fedora некоторые пользователи Thunderbird наткнулись на сообщение:
Send Message Error
Sending of message failed.
The message could not be sent using SMTP server smtp.***.com for an unknown reason. Please verify that your SMTP server settings are correct and try again, or contact your network administrator.
The message could not be sent using SMTP server smtp.***.com for an unknown reason. Please verify that your SMTP server settings are correct and try again, or contact your network administrator.