reverse dns

Hi @airberg583,

We understand that your trying to set up reverse DNS (PTR). We hear you, and we'll be glad to assist you.

Setting up reverse DNS (PTR) records is crucial for ensuring that your SMTP server’s emails are accepted by major email providers like Gmail.

Let’s address this step by step:

Maps an IP address to a name. This is very important for finding return paths, particularly with e-mail and security) (e.g., 66.94.230.32 = www.yahoo.com). You can submit your PTR request to dnsrequests@att.com from an authorized contact’s email address. In your email, include the IP address for which you need a PTR record and the corresponding fully qualified domain name (FQDN) (e.g., mail.domain.com or remote.domain.com).

We recommend that you go through this article about ⁠Reverse DNS for more information. 

To allow your SMTP server to communicate over port 25, you’ll need to ensure that it’s not blocked by your ISP or firewall. AT&T residential accounts typically block port 25 by default due to security concerns. To allow your SMTP server to communicate over port 25, you’ll need to ensure that it’s not blocked by your ISP or firewall. Keep in mind that port 25 is often used for sending email, but it’s also a common target for spam and abuse.

Remember that PTR records are essential for email deliverability, especially when dealing with major email providers. We hope this information helps. 

If you need help with anything else, let us know. We'll be happy to assist you.

Thank you for contacting us on AT&T Community Forums. 

Jennifer, AT&T Community Specialist.