Two MTA's one firewall

[mizzy]

Hi,

Would anyone know if it is possible to have two MTA's for
two different mail domains behind one firewall.

I'm using lotus notes 4.6.6b and Gauntlett Firewall.

Whenever mail for domain B comes to my firewall it always gets sent to the MTA for domain A which rightly advises that the MTA does not relay mail.

I want the firewall to route the mail to the correct MTA when it receives it.

Many thanks,
Damien.
p.s. I really want the two MTA's I do not want to have the domains routing mail between each other.