Hi!

> No, you let them through by configuring your TMDA to allow such
> messages.  TMDA does not let them through by default.

That is correct for the <> case. But TMDA recognizes "xyz <@yahoo.com>"
for the envelope sender as <> - and that is the problem!

> Your LOGFILE_INCOMING file will show you exactly which rule allowed the
> message through.

And the information in this file is the following:

| Date: Fri Aug 8 18:27:08 CEST 2003
| Sndr: <>
| From: "" <@prihost.com>
|   To: [EMAIL PROTECTED]
| Subj: Can you reduce your mortgage payment? Find out now.
| Actn: OK (from <> ok)                                  (2661)

As you see the rule "from <> ok" is applied. But the envelope sender IS
NOT <> but '"" <@prihost.com>' like in the From line.
I've tested that out and it's always the same result: the message is
coming through with "from <> ok"!

>
> > Does anybody know how to stop at least the messages with an envelope
> > sender starting with @?
>
> Postfix has a configuration option called 'strict_rfc821_envelopes'
> that you can enable, which will block mailformed messages like this.
>
> You should apply the equivalent fix to whatever MTA you are running.

I'm running qmail -- is there any fix available?

> > Another question: has anybody an idea how to set a filter matching
> > on addresses like "[EMAIL PROTECTED]"?
>
> See the documentation, but something like 'from [EMAIL PROTECTED] bounce'
> would be an example.

But wouldn't that block all messages from yahoo.com ([EMAIL PROTECTED],
[EMAIL PROTECTED], and so on)?
But I want to block only ONE address: [EMAIL PROTECTED] - so I have to use a
kind of escape character to prevent the system from interpreting the * as
a wildcard -- is one available?

Thanks,

Quirin

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