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.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

An error occurred while sending mail. The mail server responded: Spam detected by content scanner.

  • 1 reply
  • 2 have this problem
  • 3 views
  • Last reply by david

vmarcantonio
vmarcantonio
more options

Hello Mozilla Support,

I am not able to send email. I receive the following message: An error occurred while sending mail. The mail server responded: Spam detected by content scanner.

I have been using Thunderbird for several months and haven't had a problem sending email until now. I am definitely not sending spam. I haven't made any changes to my account or server and it is not due to a firewall.

Please help.

Thank you, Victor

Hello Mozilla Support, I am not able to send email. I receive the following message: An error occurred while sending mail. The mail server responded: Spam detected by content scanner. I have been using Thunderbird for several months and haven't had a problem sending email until now. I am definitely not sending spam. I haven't made any changes to my account or server and it is not due to a firewall. Please help. Thank you, Victor

All Replies (1)

david
david
  • Top 10 Contributor
more options

Check content of message as sent to see if there is additional content, such as a sig attachment that some antivirus software insert.