Re: multiple reverse DNS?

[Halassy Zoltán]

If I have a box with a valid reverse DNS entry of mail.example.com that
has virtual domains of

domain.com
otherdomain.com
somedomain.com

will my "wrong" reverse DNS for the virtual domains affect delivery? Do
I need to do anything?

You can simply do the following:

domain.com. MX 10 mail.example.com.
otherdomain.com. MX 10 mail.example.com.
somedomain.com. MX 10 mail.example.com.
mail.example.com. A 192.168.2.1
1.2.168.192.in-addr.arpa. PTR mail.example.com.

(and use mail.example.com in EHLO)



domain.com. MX 10 real.example.com.
otherdomain.com. MX 10 real.example.com.
somedomain.com. MX 10 real.example.com.
mail.example.com. CNAME real.example.com.

;assuming already set:
real.example.com. A 192.168.2.1
1.2.168.192.in-addr.arpa. PTR real.example.com.

or if you can't set the ptr record (you should be able to by your isp), use the present record and a cname:

smime.p7s
Description: S/MIME Cryptographic Signature