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
Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.
Cartlannaithe

Can't send any emails in thunderbird, keep getting an error message.

mozilla183

error: "An error occured while sending mail. The Mail server responded: *My username* sender address rejected: Not owned by user *My username** please check the message recipent *___* and try again.

error: "An error occured while sending mail. The Mail server responded: *My username* sender address rejected: Not owned by user *My username** please check the message recipent *___* and try again.

All Replies (1)

There is a similar question on another forum - is it also yours?