Dear All For longer times I can't send any mesasges from 2 of 4 mail acoounts I have. Error is "The message could not be sent because the connection to Outgoing server (SMTP) XXXXX timed out. Try again." The not working acounts are @gmail.com and @mail.ru and @rwth-aachen.de. It was possible before but not now. I still receive all the messages but can't send anything! I have tried everything described in the Thunderbird help page* (check the stpm data**, stop Firewall, chaning security in Thunderbird etc) but without access *https://support.mozilla.org/en-US/kb/cannot-send-messages **https://help.mail.ru/mail/mailer/popsmtp **https://support.google.com/mail/answer/7126229?hl=de I checked if the passwords for the mail-accounts are correct- they are! I'm desperated, it took hours and no solution... What to do?