Binding Sending to an IP on multihomed host

[bobjunga]

How can I get sendmail to use a specific address as the *source* IP when sending outgoing mail? I am trying to get my reverse lookup right to get rid of "may be forged" messages in the header of outgoing mail.

one IP address on the computer where sendmail is running is set up correctly to forward and reverse resolve -
ie.
mail1.xcade.net -> 4.78.160.141
4.78.160.141 -> mail1.xcade.net

But since there are several IPs on this host, sendmail is picking the wrong one. I need it to bind to 4.78.160.141.

I have aleardy configured in sendmail.mc to have it listen only to 4.78.160.141, but this did not effect the source IP of outgoing connections.

Anybody know how to do this?

--BobG

 

[jkupski]

Set your system's default gateway to be the gateway of the interface you want to use for outgoing mail.

 

[RhythmAce]

How did you tell it to only listen on that address?