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

Help with Mailsleuth

  • 1 cavab
  • 1 has this problem
  • 10 views
  • Last reply by gild

more options

I have installed Mailsleuth from the Mozilla Add-on website and when I right click on the email in the inbox the email that is to be sent to Mailsleuth I get the following message:

An error occurred while sending mail. The mail server responded: 5.1.8 - Invalid email domain for: trace-request@mailsleuthonline.com [R0109008].

Please check the message recipient "trace-request@mailsleuthonline.com" and try again.
I have installed Mailsleuth from the Mozilla Add-on website and when I right click on the email in the inbox the email that is to be sent to Mailsleuth I get the following message: An error occurred while sending mail. The mail server responded: 5.1.8 - Invalid email domain for: trace-request@mailsleuthonline.com [R0109008]. Please check the message recipient "trace-request@mailsleuthonline.com" and try again.

All Replies (1)

more options

Mailsleuth
Total of 7 reviews for this add-on. First 4 dated in 2011, 2012 and 2013 were 5 star 'raves?', but the last 3 indicate that the users were having problems.

Links to the developer's site are not working. He may have closed his site down.

https://addons.mozilla.org/en-US/seamonkey/addon/mailsleuth/

TB-38.3 Win10-PC