You probably ended up here because you tried to send an email to one of the users hosted on Dotcomfy, and you got an error message with a link to this page.
If you fill in the form below, I'll try to help you to find out why your email bounced. Fill in as much information as you've got, and I'll do the rest.
Even better, just copy & paste the whole error message that you got back.
No valid blocked address found, maybe you came here at your own free will.
Use this form to check an IP address against our block list. For testing, you can use 127.0.0.2:
Check an address against various third party DNS based block lists:
https://mxtoolbox.com/SuperTool.aspx?action=blacklist%3a&run=toolpage