On Fri, 2004-08-06 at 02:45, Alexander Dalloz wrote:
> Real time sender verification with your Postfix. I use it for
> fetchmailed mail with milter-sender integrated into Sendmail. It saves
> me from a lot of SPAM because many if not most senders of SPAM is faked
> and thus not existing. This way, with sender address verification the
> mail is simply discarded. An example from my logs:
>
> Milter: to=<fetchmail@xxxxxxxxxxxxxxxxxx>, reject=550 5.7.1 recipient
> denied, because MX 10 'Vent.mokrohajska-school.sk.' [193.87.162.1] for
> <pkramervb@xxxxxxxxxxxxxxxxxxxxx> rejected sender. Their reason
> "<pkramervb@xxxxxxxxxxxxxxxxxxxxx>: User unknown": 1 Time(s)
> discarded: 1 Time(s)
Do you have a URL or some such where I could read up on this a bit more?
That looks very interesting. (Even if I don't implement it for myself,
it could be very useful for web applications that talk to SMTP servers,
which we all know is a security minefield.)
Thanks a lot for the great feedback.
Best, Darren
--
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D. D. Brierton darren@xxxxxxxxxxx www.dzr-web.com
Trying is the first step towards failure (Homer Simpson)
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