Victor Duchovni:
> On Tue, Nov 30, 2010 at 11:57:08AM -0600, Noel Jones wrote:
>
> >> We have a canonical.regexp:
> >>
> >> /us...@.*\.subdomain\.com/ u...@domain.com
> >>
> >> main.cf:
> >>
> >> canonical_maps = hash:/usr/local/postfix/etc/canonical
> >> regexp:/usr/local/postfix/etc/canonical.regexp
> >> canonical_classes = envelope_sender, header_sender, header_recipient
>
> Unfortunately, while leaving out "envelope_recipient" disables the
> associated rewrite, it does not disable the recipient validation lookup
> against canonical_maps, and so if this MTA accepts external email for
> any of the sub-domains in question, it will backscatter invalid
> recipients.
>
> It is now best to rewrite addresses to external form in smtp_generic_maps,
> not canonical_maps. One can also use a different setting of smtp_generic_maps
> for the "smtp" and "relay" transports if the mapping needs to be diffent
> for mail going in vs mail going out.
I second this suggestion. If email addresses need to be sanitized
only for external use, then the sanitization is best done on output
(with smtp_generic_maps), for the default smtp" transport only.
master.cf:
relay unix n - - - - smtp
smtp unix n - - - - smtp
-o smtp_generic_maps=hash:/etc/postfix/whatever
Wietse
