Postfix appends the local domain to addresses before it processes
the canonical map.

The reason is that you would otherwise need multiple entries
for the same host or domain name, one with and one without
the local domain.

Technically, the senders are at fault, because SMTP requires
fully qualified domain names.

        Wietse

Lars Kellogg-Stedman:
> We've recently made the switch from sendmail to postfix at my place of
> employment, and we're lovin' it so far :).
>
> We have run into a minor hangup -- we have a large popular of users here
> who are used to sending email to unqualified addresses (e.g., userfoo
> rather than userfoo.company.com, where foo.company.com is a subdomain,
> not a hostname).
>
> I'm having some problems with the configuration on our perimiter mail
> relay(s) -- they don't appear to be rewriting unqualified addresses as I
> would expect.
>
> I have the following in /etc/postfix/canonical:
>
> foo foo.company.com
> bar bar.company.com
> otherplace otherplace.company.com
>
> The following in /etc/postfix/relay_domains:
>
> foo.company.com smtp:[mail.foo.company.com]
> .foo.company.com smtp:[mail.foo.company.com]
> bar.company.com smtp:[mail.bar.company.com]
> .bar.company.com smtp:[mail.bar.company.com]
>
> And the folowing in main.cf:
>
> mydomain = foo.company.com
> mydestination = $myhostname, localhost.$mydomain,
> hash:$config_directory/relay_domains
> canonical_maps = hash:$config_directory/canonical
>
> transport_maps = hash:$config_directory/transport,
> hash:$config_directory/relay_domains
> relay_domains = $mydestination, hash:$config_directory/relay_domains
> masquerade_domains = hash:$config_directory/relay_domain
>
> Both foo.company.com and bar.company.com are included in relay_domains and
> in masquerade_domains.
>
> Given the following session:
>
> HELO host.foo.company.com
> MAIL FROM: <larsfoo.company.com>
> RCPT TO: <larsotherplace>
> DATA
> ...
> .
>
> I get errors because postfix rewrites <larsotherplace> to
> <larsotherplace.foo.company.com> -- apparently ignoring the entries in
> canonical_maps.
>
> I'm assuming the problem here is actually my understanding of the whole
> process, so I'd appreciate some pointers. Let me know if I've provided
> insufficient information.
>
> Thanks,
>
> -- Lars
>
> --
> Lars Kellogg-Stedman <larslarsshack.org>
>
>
>
>
>

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