st...@thornet.co.uk:
> i.e. mail arriving on IP1, IP2 & IP3? to relay out
> on IP1, but mail mail arriving on IP4 to relay out on IP4. No local mail
> will arrive on IP4.
> We could do this with two instances of postfix,
Yes, that is a good idea. It also allows you to give
IPv4 and IPv6 addresses to the same domain.
> but is it possible to achieve it with one instance?
It is not implemented. Multiple instances gives better control over
policies, and the cost of one master+qmgr is negligible. If you
intend to maintain configurations by hand you're working too hard.
Wietse
