On Thu, Mar 08, 2012 at 07:06:25PM -0500, Wietse Venema wrote:
> > On Tue, Mar 06, 2012 at 04:26:09PM -0500, Ben Rosengart wrote:
> > 
> > I want to rewrite *sender addresses* (preferably headers only) when
> > these conditions are _all_ met:
> > 
> >   1. Client is not in an ACL,
> >   2. Sender matches a particular LDAP filter, or isn't in LDAP, _AND_
> >   3. Recipient is in $relay_domains.
> > 
> > [...] this is outside what Postfix is intended for, and it should be
> > implemented in a milter [...]
> 
> Exactly.

I am wondering, though, how to handle the case where recipients are
a mix of internal and external.  This seems like an area where Postfix
might supply some leverage.

If, upstream, I separate the recipients into different transports,
will this cause the upstream Postfix to "split the envelope" and send
the mail in >1 transaction, even though both transports are implemented
with smtp(8) and the nexthop is the same?

Thanks,
-- 
  Ben Rosengart           "Like all those possessing a library,
  Sendmail, Inc.           Aurelian was aware that he was guilty of
  +1 718 431 3822          not knowing his in its entirety [...]"
                                      -- Jorge Luis Borges

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