Hello, I am trying to set up my university email account to work with thunderbird. I am using the following settings. Server Settings IMAP Mail Server Server Name: outlook.office365.com Port: 993 User Name: name@university.com Connection security: SSL/TLS Authentication method: = OAuth2 SMTP Server Settings Server Name: smtp.office365.com Port: 587 Connection security: STARTTLS Authentication method: OAuth2 User Name: name@university.com The error that I get when sending emails is ''Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp.office365.com timed out. Try again.'' I can receive emails with no problems. I tried many different solutions: * changing the SMTP server settings * disabling the firewall * changing Linux distribution * reinstalling thunderbird * removing and adding again the account * removing and adding again the password But nothing work. I really like thunderbird and would like to keep it (the web version of outlook is not great in my opinion) Could you help me? Thanks in advance