AT&T Issues With Emails (Updated)
February 20, 2025 –We’ve been receiving multiple inquiries from customers trying to send emails to att.net, bellsouth.net and other domains handled by the AT&T servers from Microsoft 365 hosted accounts. The people using the Microsoft accounts are getting bounces saying that the email was rejected for security reasons because it does not have a PTR record. A PTR record is basically caller-ID for servers on the internet. The problem is that Microsoft’s servers DO have PTR records that are correct and complete, but AT&T’s servers aren’t able to figure that out.
The message receive will say something like “A security check at att.net failed due to misconfigured settings at <sender’s domain>.”
However, that is inaccurate…The sending domain will be correct, and it is, in fact, problems on AT&T’s end.
This issue is NOT affecting emails hosted by Network Solutions, Inc. So far, we’ve only seen this happening to Microsoft hosted email accounts.
CORRECTION: This issue WAS also affecting emails coming from our servers, but not every email is being blocked. As of 7:00am February 21, we do not know if the issue is completely fixed, but we have seen some emails blocked by this problem. Since not all emails are being blocked, our recommendation is that if you receive a bounce message, try sending it again as it may go through.