Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More
Archyvinta

e-mail/box in/out

cnveneros

cannot send out e-mails or forward e-mails since the latest thunderbird update. Unsing office 365,

I can receive but not send.

cannot send out e-mails or forward e-mails since the latest thunderbird update. Unsing office 365, I can receive but not send.

All Replies (1)

MS sent messages to users about server changes. Try these: - incoming: outlook.office365.com, port 993, SSL/TLS, Oauth2 (assuming IMAP) - outgoing: smtp.office365.com, port 587, STARTTLS, Oauth2