I've got a handful of postfix servers in various subdomains of a private
TLD. What I'm ultimately looking to do is rewrite anything going
through the gateway box to a specific catch-all user of a legitimate
domain, so at least I can deal with bounces and the sort.
Starting: joeuser@somemachine.domain1.example.private
Desired: catchall+joeu...@example.com
I'm using masquerade_domains to collapse all the machines down to
user@example.private as it's acceptable and preferred (not all have
local delivery) for "internal" mail. All systems within that private
domain use the same mail relay, and this'd happen before a rewrite if I
understand the processing order.
In the past I've used canonical mapping to rewrite something like
user@example.private to u...@example.com, which is great for a 1:1, but
not as much when you don't know all the end users that you'll be
presented with.
I'm guessing in this case, I need to do a sender_canonical regexp
similar to:
/^(.*@)example.private$/ catchall+${1}example.com
However, what I'm looking to do is use address extensions for only mail
that leaves for the internet, not all "in-house" mail. Is there a way
without running a separate instance or additional box to easily make
this distinction (specific localdelivery agent maybe?)
I don't presently expect "return mail" to work (although I suspect I
could script a delivery agent to convert from route-able catchall with
address extensions to an internal user)
Thanks for any gentle pointers in the right direction. I just can't
seem to find the right combination of rewrite examples in documentation,
and the local vs remote decision just complicates things ;)
John
