[Technik] POP/IMAP-before-SMTP
Michael Hierweck
team at edv-serviceteam.net
Mon Jul 2 12:11:14 CEST 2007
Hallo,
wir haben ja bekanntlich kein IMAP-before-SMTP konfiguriert.
Das Debian-Paket pop-before-smtp würde beides abdecken.
Package: pop-before-smtp
Priority: extra
Section: mail
Installed-Size: 196
Maintainer: Jonas Smedegaard <dr at jones.dk>
Architecture: all
Version: 1.36-1
Depends: postfix | mail-transport-agent, libnet-netmask-perl,
libtimedate-perl, perl
Suggests: postfix-tls, imap-server, pop3-server
Filename: pool/main/p/pop-before-smtp/pop-before-smtp_1.36-1_all.deb
Size: 44184
MD5sum: 76a1182a8b404baad038decbf11f3451
SHA1: 0e3f9849f4e3feb31f23427b0cb375ce94c1d9d3
SHA256: 53041860f7792247b2b0c213d7851fd9c4a366579e28021ef0fac63160d2775c
Description: watch log for POP/IMAP auth, notify MTA to allow relay
Spam prevention requires preventing open relaying through email
servers. However, legitimate users want to be able to relay. If
legitimate users always stayed in one spot, they'd be easy to describe
to the daemon. However, what with roving laptops, logins from home,
etc., legitimate users refuse to stay in one spot.
.
pop-before-smtp watches the mail log, looking for successful
POP/IMAP logins, and includes the originating IP address into a
database which can be checked by a Mail Transport Agent (MTA), to
allow relaying for people who have recently downloaded their email.
.
Contrary to other similar tools pop-before-smtp needs no hacking
in the mail daemons. It should be run on the same machine as your
MTA (since they need to share access to a database file). It also
needs access to the POP/IMAP daemons' log file, so these daemons
should either (1) also be running on the same machine, or (2) they
should be using syslog's remote-logging feature to forward the
POP/IMAP messages to the machine where pop-before-smtp and the
MTA are running.
Meinungen?
Viele Grüße
Michael
--
EDV-Serviceteam Werthmann & Hierweck GbR
Annika Werthmann, Michael Hierweck
Kleyer Weg 36, 44149 Dortmund
http://www.edv-serviceteam.net
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