I have set rDNS to mail.simplyislam.biz for IP 178.32.48.104 with my hosting server and also in DNS control panel.
However, I am still failing this test
Result: SMTP Reverse DNS Mismatch Warning – Reverse DNS does not match SMTP Banner. See attached
But as far as I can see my rDNS for the IP address are both the same: mail.simplyislam.biz
I am at a loss as to how to fix the issue please ?
Best Answer
The SMTP Banner is the response of your mail server for the
ehlo
query. Currently your mail server is closing the connection. That is the reason for the mismatch between rDNS and SMTP banner. Reverse DNS itself is set up correctly, though.Having looked a little deeper, your DNS and mail server configuration seems a little messy:
Your domain (the part behind the "@" in an email address) needs a
MX
record pointing to your mail server:simplyislam.biz. 3600 IN MX 10 mail.simplyislam.biz.
Then you need an
PTR
record pointing your IP address to your mail server, but that does already exist:104.48.32.178.in-addr.arpa. 3600 IN PTR mail.simplyislam.biz.
Your mail server address does not need an
MX
record, unless you are expecting emails sent to "@mail.simplyislam.biz".Of course you need to do the same things for your primary mail server "mail.simplyislam.com".