[H-GEN] Mail access file

[Mark Suter]

[ Humbug *General* list - semi-serious discussions about Humbug and     ]
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David,

> The 150.101.179.78 is marvin's static ip address.  How can I reject
> mail like this? I tried putting that ip address in /etc/mail/access
> but that does not seem to have had any effect. Yes, I did do the
> database re-build and re-start sendmail. Am I on the right track?

No.  Let's take a closer look at that suspect header you gave us:

> Received: from 150.101.179.78 ([61.11.75.19])

The address on the left is whatever the mailserver called itself
with the "EHLO" command - it's red herring in this case.  Here's
a complete example:

    $ nc -v mail.audiovisualdevices.com.au smtp
    DNS fwd/rev mismatch: mail.audiovisualdevices.com.au != eth79.qld.adsl.internode.on.net
    mail.audiovisualdevices.com.au [150.101.179.78] 25 (smtp) open
    220 marvin.audiovisualdevices.com.au ESMTP Sendmail 8.11.6/8.11.6; Thu, 21 Aug 2003 22:12:11 +1000
    HELO a-sample-string
    250 marvin.audiovisualdevices.com.au Hello dyn232.bne1.homedsl.pacific.net.au [203.143.244.232], pleased to meet you
    MAIL FROM:<suter at humbug.org.au>
    250 2.1.0 <suter at humbug.org.au>... Sender ok
    RCPT TO:<david at audiovisualdevices.com.au>
    250 2.1.5 <david at audiovisualdevices.com.au>... Recipient ok
    DATA
    354 Enter mail, end with "." on a line by itself
    Very simple test email.
    .
    250 2.0.0 h7LCD3t18388 Message accepted for delivery
    QUIT
    221 2.0.0 marvin.audiovisualdevices.com.au closing connection

Lesson: take care when reading headers!

Yours sincerely,

- -- Mark John Suter  | I know that you  believe  you understand
suter at humbug.org.au | what you think I said, but I am not sure
gpg key id 2C71D63D | you realise that what you  heard  is not
mobile 0411 262 316 | what I meant.        Robert J. McCloskey
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