On Wed, Sep 16, 2009 at 10:13:19PM -0400, Sahil Tandon wrote:
> On Wed, 16 Sep 2009, Victor Duchovni wrote:
>
> > On Wed, Sep 16, 2009 at 07:14:35PM -0400, Sahil Tandon wrote:
> >
> > > # main.cf
> > > recipient_canonical_maps = cdb:/usr/local/etc/postfix/canonical
> > >
> > > # /usr/local/etc/postfix/canonical
> > > @exmaple.org @example.org
> >
> > I strongly discourage "recipient_canonical_maps". Use canonical_maps
> > instead. Unlike the message envelope, headers are rarely single-purpose,
> > and what is a sender to one user, becomes a recipient to another
> > (reply, ...).
>
> Thanks Victor. But does the caution against recipient_canonical_maps
> apply in the OP's use case of just correcting a spelling mistake on
> outgoing mail?
Yes, the more typical problem case is with sender_canonical_maps,
when is tempted to canonicalize one's own obsolete domains in "sender"
addresses only. There failure to rewrite "To:" and "Cc:" addresses
can make mail unrepliable.
Indeed, problems with "recipient_bcc_maps" are more rare. Still, in
most cases it is reasonable to also also correct "Reply-To" or "From"
if someone botches those...
--
Viktor.
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