PTR record of the mail server.

[leung]

Hi,

I have just found that some emails are being rejected by other mail servers because the PTR record of our mail server doesn't match the MX record in the DNS. However, I have checked the DNS, and I am sure that I have set the PTR and MX with the correct value. Why do some mail servers see the PTR record, while some don't and reject our mails?

Thanks

Ricky

 

[katamann]

Most smtp servers don't do a reverse lookup when processing mail. However some do, and will reject if it doesn't match and/or doesn't exist.

Usually the ISP is administrating the reverse lookup zones. It doesn't help to set up a reverse zone if the root servers don't know about your dns server.

Try to do a reverse lookup from another site on the internett to verify what response you get.

 

[Guest_imported]

You can check foa PTR record on a IP by doing the following;

nslookup
set = ptr
(enter the IP address of the mail server)

This will tell you if the other party has a PTR record.

Good Luck,
kennys65804@yahoo.com