Mail routing and MX records: trouble

[Simon Waters]

Steve Linberg wrote:
> 
> who bounce it because a reverse lookup of the
> sending domain "didn't work".

> Assuming it's not a DNS configuration error somewhere on their part, is
> there anything wrong with the above that I should fix?  Or is there more
> detail I could provide that would help diagnose the problem?

If you want us to help diagnose the problem the real domain and
IP address would be really helpful.

Since it is a reverse lookup problem according to you, the
reverse zone would be helpful as well.