Your external IP has already set PTR record :
Quote:
host -v 202.144.1.37
Trying "37.1.144.202.in-addr.arpa"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51944
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 4
;; QUESTION SECTION:
;37.1.144.202.in-addr.arpa. IN PTR
;; ANSWER SECTION:
37.1.144.202.in-addr.arpa. 86400 IN PTR lan-202-144-1-37.maa.sify.net.
|
You just have to forward this mail communication to this IP and go out on DMZ (your local net/sys admin can arrange that, I believe), or the other option, like I said, set
DNS records for your internal IP like : my.domain-for-mail.com, but most likely you'll get rejected due to SPF confilct by certain mail services.
