My email rejected: my ip/hostname can't be found

[Duboux]

Help, my email gets blocked by a server that scans if my ip/hostname is correct:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

[email protected]
SMTP error from remote mail server after RCPT TO:<[email protected]>:
host mail.mail.com [789.456.123.159]: 550 Client host rejected:
cannot find your hostname, [123.123.123.100]

My own account has its own private ip on that server.
The serverdomain = da.mydomain.com 123.123.123.100
My domain = *.mydomain.com 123.123.123.105 (same domain, diff ip)
The recipients mail server scans the main ip (123.123.123.100) from my box.

In an external dns-server I keep the following:
da.mydomain.com --> 123.123.123.100
mydomain.com --> 123.123.123.105
www.mydomain.com --> 123.123.123.105

Under "DNS Administration" in the admin-cp, I see nothing..



(of course, for privacy, the mentioned ip's and email addresses are examplified)


I got SpamBlocker 2 with newest Exim and Dovecot


Please help

 

[nobaloney]

(of course, for privacy, the mentioned ip's and email addresses are examplified)

And of course this means we really can't help you.

Look here.

Jeff

 

[RaZer0r]

totaly true, but anyhow, my first guess would be: no Reverse dns available on your ip. check the Class Block holder (your datacenter provider or ISP) if they gave you a reverse dns. If not, request one, (you can't set a Rdns yourself, unless you manage the Ip block yourself)