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Tom Lane heads up

Just dropping a quick not for Tom Lane. I sent a personal message
today, but I wasn't sure if you'd get it after I remembered all of the
spam filters you've got set up.

Sorry for the off topic post.

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Nov 23 '05
69 6432
When grilled further on (Mon, 19 Apr 2004 21:19:05 -0700),
Joe Conway <ma**@joeconway .com> confessed:
Marc G. Fournier wrote:
Huh? I just use Spamassassin myself, with Razor/Pyzor/DCC and Bayes all
enabled ...


I use exactly the same setup. But recently I've noticed that the
spammers are getting smarter -- I think 20% of it is slipping by the
filters. I'm going to need something better.


Have you played with the "spamassass in --report" feature? Works fairly well if
you can integrate it into your e-mail client and report a bunch of
messages as spam. It trains the Bayes filter and reports to Razor (at
the least).

Sylpheed Claws has actions (you use "spamassass in--report %F" as the action),
and it'll batch the report on all selected messages.

I find that after a 10-20 messages, it starts finding the ones that were
slipping through. Since February, I have 200 missed out of 4200.

Cheers,
Rob

--
22:28:27 up 3 days, 2:06, 3 users, load average: 3.24, 3.08, 3.45
Linux 2.6.5-01 #5 SMP Tue Apr 6 21:32:39 MDT 2004

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=HZLL
-----END PGP SIGNATURE-----

Nov 23 '05 #11
Marc G. Fournier wrote:
Huh? I just use Spamassassin myself, with Razor/Pyzor/DCC and Bayes all
enabled ...


I use exactly the same setup. But recently I've noticed that the
spammers are getting smarter -- I think 20% of it is slipping by the
filters. I'm going to need something better.

Joe

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Nov 23 '05 #12
On Tue, Apr 20, 2004 at 01:06:18AM -0400, Tom Lane wrote:
Will Trillich <wi**@serensoft .com> writes:
is there some way of getting a look at tom's or marc's filters? i could
sure use a bit of help there. lordy, we're close to drowing in the
stuff!


Tell me about it :-(

I currently use four levels of filtering:

1. DNSBL lists: blackholes.five-ten-sg.com, bl.spamcop.net, relays.ordb.org
(there are others out there, but these seem to have a good impedance
match to my personal spam load).

2. Private blacklist of IP ranges that have sent me too much spam.
sendmail has a pretty easy mechanism to support this, although it
only seems to support /8 /16 or /24 ranges which is a bit coarse.
(If you've gotten a "Go away spammer" bounce from me, you were caught
by this filter --- let me know and I'll tighten the ranges.)

3. I have noticed that bouncing any machine that sends "HELO
sss.pgh.pa.us" gets rid of a ton of spam and viruses. I don't know of
any real clean way to do this, but I have a sendmail.cf hack for it.

4. Very long list of procmail filters on header and body patterns.


It must be pretty difficult maintain these header and body patterns
and the others lists. I had same problem and I resolve if by
"spamassass in", it knows learn and it's more simple than procmailrc
coding. Now I have cca 5% of all spams in my INBOX.

Karel
--
Karel Zak <za***@zf.jcu.c z>
http://home.zf.jcu.cz/~zakkr/

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Nov 23 '05 #13
Joe Conway wrote:
Marc G. Fournier wrote:
Huh? I just use Spamassassin myself, with Razor/Pyzor/DCC and Bayes all
enabled ...


I use exactly the same setup. But recently I've noticed that the
spammers are getting smarter -- I think 20% of it is slipping by the
filters. I'm going to need something better.


Here is what I use:

http://candle.pha.pa.us/main/writings/spam/

I get 98% blockage with no false positives, or at least only 1-2 a year
(that folks tell me about). :-)

--
Bruce Momjian | http://candle.pha.pa.us
pg***@candle.ph a.pa.us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073

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TIP 9: the planner will ignore your desire to choose an index scan if your
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Nov 23 '05 #14
Tom Lane said:
Will Trillich <wi**@serensoft .com> writes:
is there some way of getting a look at tom's or marc's filters? i could
sure use a bit of help there. lordy, we're close to drowing in the
stuff!


Tell me about it :-(

I currently use four levels of filtering:

1. DNSBL lists: blackholes.five-ten-sg.com, bl.spamcop.net, relays.ordb.org
(there are others out there, but these seem to have a good impedance
match to my personal spam load).

2. Private blacklist of IP ranges that have sent me too much spam.
sendmail has a pretty easy mechanism to support this, although it
only seems to support /8 /16 or /24 ranges which is a bit coarse.
(If you've gotten a "Go away spammer" bounce from me, you were caught
by this filter --- let me know and I'll tighten the ranges.)

3. I have noticed that bouncing any machine that sends "HELO
sss.pgh.pa.us" gets rid of a ton of spam and viruses. I don't know of
any real clean way to do this, but I have a sendmail.cf hack for it.

4. Very long list of procmail filters on header and body patterns.

#2 and #4 are fairly personal, in the sense that they have a decent
success/failure ratio for the junk mail I get. I wouldn't recommend
that someone else try my lists, and in any case they take a heck of a
lot of hand maintenance. I've been looking into more automated methods
such as CRM114 but haven't made the jump yet.


Yes they sure are. I tried my personal blacklist on a client's server one
time after they complained of seeing dozens a minute slipping by. It did just
about nothing, but it got them started on their own. #3 looks interesting
though...

Best regards,

Jim Wilson
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Nov 23 '05 #15
Karel Zak wrote:
It must be pretty difficult maintain these header and body patterns
and the others lists. I had same problem and I resolve if by
"spamassass in", it knows learn and it's more simple than procmailrc
coding. Now I have cca 5% of all spams in my INBOX.


It's not that difficult here but I'm using Postfix, which has built in
pattern checking. Because my mail server also hosts a bunch of topical
internet mailing lists (mainly motorcycle and bass player stuff) and all
of their admin addresses were harvested by spammers long ago, I don't
just get one copy of spam. I usually get several because each of those
admin addresses eventually alias back to me.

I don't use SpamAssassin or Razor but I manage to kill 95% of spam at
the SMTP stage, before the message is accepted for delivery. This works
better than a delivery stage mail processor like procmail because it
bounces the spam back to the server actually sending it. It's easy to
see from the maillogs what IPs are regularly sending me this crap so
they can be blackholed permanently. I think I've got most of CHINANET
in the bit bucket now <g>.

---------------------------(end of broadcast)---------------------------
TIP 7: don't forget to increase your free space map settings

Nov 23 '05 #16
Will Trillich <wi**@serensoft .com> writes:
is there some way of getting a look at tom's or marc's filters? i could
sure use a bit of help there. lordy, we're close to drowing in the
stuff!


Tell me about it :-(

I currently use four levels of filtering:

1. DNSBL lists: blackholes.five-ten-sg.com, bl.spamcop.net, relays.ordb.org
(there are others out there, but these seem to have a good impedance
match to my personal spam load).

2. Private blacklist of IP ranges that have sent me too much spam.
sendmail has a pretty easy mechanism to support this, although it
only seems to support /8 /16 or /24 ranges which is a bit coarse.
(If you've gotten a "Go away spammer" bounce from me, you were caught
by this filter --- let me know and I'll tighten the ranges.)

3. I have noticed that bouncing any machine that sends "HELO
sss.pgh.pa.us" gets rid of a ton of spam and viruses. I don't know of
any real clean way to do this, but I have a sendmail.cf hack for it.

4. Very long list of procmail filters on header and body patterns.

#2 and #4 are fairly personal, in the sense that they have a decent
success/failure ratio for the junk mail I get. I wouldn't recommend
that someone else try my lists, and in any case they take a heck of a
lot of hand maintenance. I've been looking into more automated methods
such as CRM114 but haven't made the jump yet.

regards, tom lane

---------------------------(end of broadcast)---------------------------
TIP 7: don't forget to increase your free space map settings

Nov 23 '05 #17
On Mon, 19 Apr 2004, Joe Conway wrote:
Marc G. Fournier wrote:
Huh? I just use Spamassassin myself, with Razor/Pyzor/DCC and Bayes all
enabled ...


I use exactly the same setup. But recently I've noticed that the
spammers are getting smarter -- I think 20% of it is slipping by the
filters. I'm going to need something better.


do you force learn those spam that get through the cracks? I get about 20
or 30 messages that slip through the cracks, which I process through with
sa-learn nightly ...

----
Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
Email: sc*****@hub.org Yahoo!: yscrappy ICQ: 7615664

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Nov 23 '05 #18
Quoting Tom Lane <tg*@sss.pgh.pa .us>:
Will Trillich <wi**@serensoft .com> writes:
is there some way of getting a look at tom's or marc's filters? i could
sure use a bit of help there. lordy, we're close to drowing in the
stuff!


Tell me about it :-(

I currently use four levels of filtering:

1. DNSBL lists: blackholes.five-ten-sg.com, bl.spamcop.net, relays.ordb.org
(there are others out there, but these seem to have a good impedance
match to my personal spam load).

2. Private blacklist of IP ranges that have sent me too much spam.
sendmail has a pretty easy mechanism to support this, although it
only seems to support /8 /16 or /24 ranges which is a bit coarse.
(If you've gotten a "Go away spammer" bounce from me, you were caught
by this filter --- let me know and I'll tighten the ranges.)


There is a sendmail script for this called "cidrexpand " that allows you to put
in CIDR blocks- i.e. things like 216.185.96.0/19 can be put into the sendmail
access file.

<--stuff deleted-->
--
Keith C. Perry, MS E.E.
Director of Networks & Applications
VCSN, Inc.
http://vcsn.com

_______________ _______________ ______
This email account is being host by:
VCSN, Inc : http://vcsn.com

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Nov 23 '05 #19
When grilled further on (Mon, 19 Apr 2004 21:19:05 -0700),
Joe Conway <ma**@joeconway .com> confessed:
Marc G. Fournier wrote:
Huh? I just use Spamassassin myself, with Razor/Pyzor/DCC and Bayes all
enabled ...


I use exactly the same setup. But recently I've noticed that the
spammers are getting smarter -- I think 20% of it is slipping by the
filters. I'm going to need something better.


Have you played with the "spamassass in --report" feature? Works fairly well if
you can integrate it into your e-mail client and report a bunch of
messages as spam. It trains the Bayes filter and reports to Razor (at
the least).

Sylpheed Claws has actions (you use "spamassass in--report %F" as the action),
and it'll batch the report on all selected messages.

I find that after a 10-20 messages, it starts finding the ones that were
slipping through. Since February, I have 200 missed out of 4200.

Cheers,
Rob

--
22:28:27 up 3 days, 2:06, 3 users, load average: 3.24, 3.08, 3.45
Linux 2.6.5-01 #5 SMP Tue Apr 6 21:32:39 MDT 2004

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Version: GnuPG v1.2.4 (GNU/Linux)

iEYEARECAAYFAkC EqlQACgkQLQ/DKuwDYznDtACeMA JYS4ijVXYec83Ap RVroey8
NMwAn2l4SEDemry foMZuEDWtNfaUVY j5
=HZLL
-----END PGP SIGNATURE-----

Nov 23 '05 #20

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