Sendmail Access.db help
Alexander Dalloz
alexander.dalloz at uni-bielefeld.de
Wed Oct 27 19:40:45 UTC 2004
Am Mi, den 27.10.2004 schrieb Yang Xiao um 21:24:
> I'm trying to prevent anyone from spoofing incoming mail as internal
> users. Example, my domain is mydomain.com
> I don't want to anyone to connection to my mail gateway and send
> emails as user at mydomain.com from the outside.
>
> I thought this can be done by access table and it's working. but the
> problem now is that it's rejecting local mail that it's trying to
> forward to the mailhost as well, how can I fix this?
No, you can't prevent this sender address spoofing with the access_db
without breaking other regular mail traffic.
> #access table
> 127.0.0.1 OK
> localhost OK
> From:localhost OK
> To:localhost OK
Above must be RELAY, OK is too less.
> From:mydomain.com ERROR:"550 Everything that has a
> beginning, has an end."
> Yang
http://www.sendmail.org/~ca/email/protected.html
Or use a milter application to check whether the sender which claims to
have a local domain address is sending from internally.
Alexander
--
Alexander Dalloz | Enger, Germany | GPG key 1024D/ED695653 1999-07-13
Fedora GNU/Linux Core 2 (Tettnang) kernel 2.6.8-1.521smp
Serendipity 21:35:53 up 7 days, 18:15, load average: 0.26, 0.19, 0.23
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