SMTP Mail problem - sent mail being blocked as a spam

[codesmith]

Mail that is getting sent from our server is getting bounced from mailers that check the RDNS entry. The ip of a domain on our server is different than the ip that mail gets routed through. Since they're doing a RDNS check on the domain name's ip they're not getting a match and bouncing the mail. Sounds like a poor implementation to me but AOL is doing this.

Any suggestions on a work around?

 

[faris]

I'm sure there's more to it than this. We have 99% of all our domains on a different ip to that which sends email (as do most ISPs - they will have dedicated mailservers) and do not have problems.

Do you have rDNS on both IPs? Does dnsstuff.com's rDNS check come back with an OK on both IPs?

Faris.

 

[codesmith]

Yes we have RDNS on both ips. Used dnsstuff.com to confirm.

 

[phoenixisp]

Do you have an spf entry in the mail server's DNS settings? AOL will bounce mail if you don't.