I run a site and a webserver on a same PC and on the same IP.I got an e-mail from some whitelisting site suggesting that I should ask my ISP (who gave me the static IP) to make sure that reverse DNS lookup will be resolving to my mail server host name and NOT my ISP's default generic host name.The domain name registrar Co. is NOT my ISP.
So I have 2 questions:
1) Should I bother with all of this? Is there a chance that something will go wrong since I have BOTH web AND e-mail servers sitting on the same IP...
2)If I should...and if it won't hurt anything...should I make reverse DNS pointing to my domain name or mail server's host name,which is mail.mydomainname.com?