michael.osi...@siemens.com:
> Am 2022-02-11 um 15:38 schrieb Wietse Venema:
> > michael.osi...@siemens.com:
> >> Hi,
> >>
> >> I am currently migrating from a sendmail-based relay to Postfix 3.6.3.
> >> Sendmail has the feature to automatically rewrite @localhost to
> >> @$myhostname automatically. As far as I have seen Postfix doesn't do
> >> this with trivial-rewrite(8) by default nor is a config option for this.
> >>
> >> What I have come up with is doing in /usr/local/etc/postfix/canonical:
> >>> @localhost @myhostname
> >>
> >> I had to add the actual hostname since @$myhostname is not supported.
> >> My question: Is this the proper way to go with Postfix to mimic sendmail
> >> behavior?
> >
> > We can do soething similar in Postfix:
> >
> > /etc/postfix/main.cf:
> > sender_canonical_maps = inline:{{@localhost = @$myhostname}}
> >
> > The downside of doing this is that the Postfix SMTP server will
> > accept mail from non-existent@localhost, so if you could make the
> > rule more specific (a collection of 1:1 mappings) then that would
> > help.
>
> Forgive me my naive questions, that's the third day I am using Postfix.
>
> Thanks for the input. That sounds like something, but duplicating
> the entire NIS map is certainly something I don't want to do and never
> set up the aliases with NIS before.
>
> What I have figured out now (according to [1]) is to send a message to
> 'non-existent@localhost' and 'non-existent', Postfix says:
> > Feb 11 16:03:02 deblndw013x3j postfix/local[44857]: 0628058368:
> > to=<m...@deblndw013x3j.ad001.siemens.net>, orig_to=<mumu@localhost>,
> > relay=local, delay=0.25, delays=0.13/0/0/0.11, dsn=5.1.1, status=bounced
> > (unknown user: "mumu")
> then reads my .foward to send bounce report and delivers to my personal
> maibox. I see this:
> > Remote Server returned '554 5.1.1 < #5.1.1 X-Postfix; non-existent: "mumu">'
>
> So leaving with the canonical hash it will reject?
All mappings "@localhost @otherdomain" have this limitation.
Wietse
