sendmail secondary server routing to alternate port

Chuck Swiger cswiger at
Tue Aug 19 17:56:27 UTC 2008

On Aug 19, 2008, at 10:16 AM, Derrick Ryalls wrote:
> For example, if I was relaying for on port 2345, I would  
> specify
> and that is the port it would use to talk to
> Now that I have switched to sendmail, I don't see a way to set the
> destination port on a per domain basis, only on an all or nothing
> basis.  Am I missing some piece of the documentation or is this an
> actual limitation of sendmail?

You can do this with /etc/mail/mailertable:

...and change to the relay mailer flags with this in your

   define(`RELAY_MAILER_ARGS', `TCP $h 2345')

Note that you might want to define a new mailer called "relay2345"  
instead of changing the default relay mailer.


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