Delayed and rejected emails to certain domains

[Gwire]

SBS 2003 Sp2 and Exchange SP1, ISP is ATT
mail server on location, website hosting elswhere for the same FQDN. I believe I am having issues with reverse dns checks from these mail servers rejecting my emails.

domain.com is hosted elswhere for website
mail for domain.com comes into office after going through psmtp.com filters.
outgoing mail from exchange hits internet with static IP xxx.xxx.xxx.xxx at location.
My SMTP virtual server properties delivery tab shows FQDN as XXXXX.XXXXX.local

I have been told that I can create a PTR for that static IP address I am using on location and assoiciate with domain.com name.
My questions is if I do this will this effect in any way my website hosting with same domain name or my incoming mail with same domain name.
Is the PTR record only for reference saying to servers that are checking this, Hey this is from mail.domain.com or domain.com?
Thanks for your help.
Gilbert

 

[58sniper]

Your ISP needs to create the PTR record for the public address that your Exchange box is using. This has nothing to do with your website or anything else.

The PTR should match your MX record. So, if you MX is mail.mydomain.com, then have the ISP create the PTR with the same name.

Pat Richard MVP
Plan for performance, and capacity takes care of itself. Plan for capacity, and suffer poor performance.

http://www.ucblogs.net/blogs/exchange/

 

[Gwire]

My MX record indicates (mydomain.com.s7a1.psmtp.com) when I do a look up.

Do I specifi only mydomain.com or mail.mydomain.com or exactly as indicated above to match mx record?

And do I change the SMTP virtual server setting under FQDN to what I have selected for PTR.

Thanks

 

[Gwire]

Update,
I am new to dns that is why the cautious approach. I have also done a look up on mail.mydomain.com and it goes totally to a different IP address not assoicated to pspmtp.com IP or website IP.
Is this another record that needs to be updated?

Thanks once again....