This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

thunderbird can't send to hotmail accounts

  • 1 reply
  • 1 has this problem
  • 3 views
  • Paskiausią atsakymą parašė Zenos

more options

hi, in the last week my thunderbird has been unable to send messages to any hotmail account. these come back with the same error message. previous to this week, never had a problem. Can anyone help?

The reason for the problem: 5.1.0 - Unknown address error 550-"SC-004 (COL004-MC2F15) Unfortunately, messages from 203.59.1.106 weren't sent. We recommend that you contact your Internet service provider. The problem is that too many unwanted messages have been sent from the following IP address above. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors."

hi, in the last week my thunderbird has been unable to send messages to any hotmail account. these come back with the same error message. previous to this week, never had a problem. Can anyone help? The reason for the problem: 5.1.0 - Unknown address error 550-"SC-004 (COL004-MC2F15) Unfortunately, messages from 203.59.1.106 weren't sent. We recommend that you contact your Internet service provider. The problem is that too many unwanted messages have been sent from the following IP address above. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors."

All Replies (1)

more options
"We recommend that you contact your Internet service provider."
Have you asked your ISP about it, as suggested? It sounds like the IP address they have given you is on a blacklist. Only they, the owners of the IP address, can work with the blacklist operators to remove it.

Modified by Zenos