[THIN] Re: OT: very wierd email problem

This is where Linux of one of the BSD Unix version, running a decent MTA and
something like SpamAssassin, really shines. No monetary cost up front at
all. I use Linux running postfix (calling appropriate RBLs) and amavisd-new
(which calls out a virus scanner, and SpamAssassin), in front of my Exchange
server. 
(yes, I realize I am advocating a solution that is more than what is
probably needed for this one specific case, but even so ... :-)

My false positive rate is something like 1%. Don't have a false negative
number (i.e., missed spam), but I'll bet it's also that low.

--
------------------------------------------------------------
Michael Leone, Systems Administrator
Philadelphia Contributionship
210 S. 4th Street, Philadelphia, PA  19106
<mailto:mleone@xxxxxxxxxxxxxxxxxxxx>
V: 215-627-1752 x1282
F: 215-627-5354

-----Original Message-----
From: Nick Smith [mailto:nick@xxxxxxxxxxxxxxx]
Sent: Wednesday, March 24, 2004 12:07 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: OT: very wierd email problem


It seems to be happening thusly;

Management: We want something done about spam
Technicians: Sure, there's this great anti-spam software, it costs about
$50/user
CIO: I don't have any budget left
Management: We're not giving you more budget, and we still want
something done about spam.
Technicians: Uhhh, well, we can activate this reverse DNS thing on our
server. That won't cost anything..
CIO: Great, do it
Technicians:...but spammers always fake legitimate adresses so it won't
do any good.
CIO: <After pause> Don't tell Management. <To Management> Well, we've
activated reverse DNS.
Management: Hoooray. We have proactively Done Something about Spam. And
it cost nothing. Doubles and bonuses all round.
Technicians: Let's go play Quake. It's more productive.

Presumably it's along the same lines that everyone activated their "It
would be really nice to tell people they've sent a virus tick box". No
it &(**& wouldn't, it's always a fake address!!!! Turn the blo*dy things
off, please!

<Bored of telling users "no, you're not sending a virus. I know the
email says you are. Look, just trust me on this..." 20 times a day>.



-----Original Message-----
From: Robert K Coffman Jr - Info From Data Corporation
[mailto:bcoffman@xxxxxxxxxxxxxxxx]=20
Sent: 24 March 2004 16:46
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: OT: very wierd email problem

This is becoming extremely common.

- Bob Coffman

-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx]On
Behalf Of Henry Sieff
Sent: Wednesday, March 24, 2004 11:07 AM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Re: OT: very wierd email problem


I just checked both of your domains; for your mail server on each one
you lack a rDNS ptr record. Many mail servers out there are configured
to just dump mail which comes from servers w/o a rDNS PTR. Fix it, and
I'd wager the problem with that domain (and probably others you don't
know about) will go away.

http://www.dnsreport.com/tools/dnsreport.ch?domain=3DPrairietitle.com
http://www.dnsreport.com/tools/dnsreport.ch?domain=3Dvdimail.com

Henry



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