Two internet connections

[Hans du Plooy <hansdp@sagacit.com>]

Hi guys,

I have a slight problem with a mailserver.  The server is accepting mail
for four domains, all of which have their MX records hosted with
different ISPs.  The mailserver is being moved from one line to another,
so at the moment it is connected to both, with the gateway set as the
firewall on the new line.

Problem is not all of the domains' MX records have been changed yet, and
connections to the old line simply doesn't work.  I don't even get a
reply if I try to telnet into it.

My feeling is that the mailserver tries to respond to the connection via
it's default gateway.   How do I tell it to respond via the interface
that the connection was made on?

Any links to relevant documentation would be appreciated.

Thanks
-- 
Hans du Plooy
SagacIT (Pty) Ltd
hansdp at sagacit dot com