Posts Tagged ‘spam’

FH_DATE_PAST_20XX spamassassin false positives

Thursday, January 7th, 2010

Spamassassin is a good way to fight spam but a quite curious bug went out in the beginning of the new year. This bug may produce a great number of valid mail messages tagged as spam.
The reason is all mail messages will match the FH_DATE_PAST_20XX rule since the 1st january 2010.
When the current release (3.2.5) was released, a message date in the year 2010 was reasonable seen as a bad mail, but now we are …in the future.
So, this rule

##{ FH_DATE_PAST_20XX
header FH_DATE_PAST_20XX Date =~ /20[1-9][0-9]/ [if-unset: 2006]
describe FH_DATE_PAST_20XX The date is grossly in the future.
##} FH_DATE_PAST_20XX

have to be disabled, waiting for the new spamassassin release.
The way suggested by spamassassin staff is to add the following line in the local.cf file:

score FH_DATE_PAST_20XX 0.0

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Posted in kludges | No Comments »

Fight the spam with ASSP

Friday, April 17th, 2009

I’ve just beginned the test of ASSP (Anti Spam SMTP Proxy) in a 1000 mailboxes organization.

I’ve set up a very small Ubuntu server on a virtual vmware host (512 Mbytes of RAM, 1 processor, 10 Gbytes of disk), and then I’ve followed the quick installation steps.
In a few minutes I was able to move all incoming mail traffic into my new SMTP proxy.
Monitoring the situation in the web interface at 55555 port of the Ubuntu box, it looks all ok.
Log files on the real mail server are showing all is running ok, too.

Info and Stats page of ASSP web Interface
Info and Stats page of ASSP web Interface

I’m very happy of this experiment: I found ASSP a good spam fighter, easy to install and configure and with a nice web interface for configuration and monitoring the SMTP traffic.

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Posted in Experiments | No Comments »