sendmail as a secondary MX

[Bill Hacker]

Janet Sullivan wrote:


*SNIP*

properly.  The only difference I see off the bat is that the new domain 
isn't in reverse DNS for any of the IP addresses on the box.

Could it be that sendmail is seeing the domain names in rDNS for the 
servers IPs, and deciding that they are local, even if they are set in 
the relay-domains file?
Exim could, either in a local DNS /rDNS or /etc/hosts - and at base it 
is 'drop in' for Sendmail.

I think you found the cause.

Bill