From: Chris McKeever (techjedigmail.com)
Date: Sun Jul 02 2006 - 14:10:04 CDT

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On 7/2/06, Magnus Bäck <magnusdsek.lth.se> wrote:
> On Sunday, July 02, 2006 at 20:35 CEST,
> Chris McKeever <techjedigmail.com> wrote:
>
> > On 7/2/06, Magnus Bäck <magnusdsek.lth.se> wrote:
> >
> > > But you don't want bounces. Bounces are bad. You want rejections. It
> > > is true that virtual alias rewriting is performed recursively -- but
> > > the recipient validation made by smtpd(8) is NOT recursive. If a
> > > lookup returns a result, the address it valid. This means that your
> > > Postfix will accept any address with a dot in it, e.g.
> > > blah.blahexample.com, and later bounce the invalid recipient
> > > bblahexample.com.

>
> What server produces this bounce? Without that information the
> above bounce message snippet is utterly and completely useless.
>
> Never show bounce messages. Always show logs from your server.
>

Magnus - thanks for helping me through this:

both messages are coming from the same server, here are the logs - one
sent with the 'dot' format and one without - both generate the same
unknown user log message

Jul 2 14:18:00 prupref-mailgate postfix/virtual[28097]: F0F07C8EBE:
to=<nonesemailexample.com>, orig_to=<no.onesemailexample.com>,
relay=virtual, delay=3, status=bounced (unknown user:
"nonesemailexample.com")

Jul 2 14:18:12 prupref-mailgate postfix/virtual[28097]: 7C1A3C8FBD:
to=<nonesemailexample.com>, relay=virtual, delay=0, status=bounced
(unknown user: "nonesemailexample.com")

> [...]
>
> --
> Magnus Bäck
> magnusdsek.lth.se
>

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