ATT Blacklists Email From Subdomains


New member
Generated a couple of mail accounts at mine,, and the mail bounces straight back if sent to any address.

Any thoughts on this?:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
SMTP error from remote mail server after MAIL FROM:<> SIZE=1732:
host []: 521- blocked by
521 DNSRBL: Blocked for abuse. See


Staff member
It`s free hosting, our good nature is abused by abusers! That`s me being polite.. We get the occasional idiot abusing the service.
We`ve got a batch of fresh IP`s coming in January.


I have seen this happen to other free hosts too. If you don't need to send automated emails you could use an external mailing service such as Gmail. That's what I do.