"spam(no null-header or sender address)" problem

[Piero Arrigoni]

Hello,

 

I run a mailscanner configuration, using postfix, spamassassin and
mailscanner. Mail accounts stores in an sql database.

 

Today I started to receive what seemed to be a Spam attack. Two of the
accounts were filled with all sort of junk mail. The messages are in several
languages, and came from different ip's from several different places.

 

The situation is really annoying because the mails are still coming in, even
receiving dozens of those mails per minute, filling the mailboxes with
garbage.

 

All of these mail one thing in common. These have empty "from" addresses. So
mailwatch flags the mail as light spam (the kind of spam that gets its
subject marked but it's delivered to the recipient anyway), giving the
following message in the spam report: "spam(no null-header or sender
address)". The spam score remains in 0.

 

I would like to modify mailscanner so that messages with empty
from-addresses get filtered as usual mail, going through the regular scoring
other mails do. 

 

Could you please help me with this?

I have been looking around a lot but still have not found a solution.

 

Thank  you all.

Best regards,

Piero 

 

P.S.:

I found a post in google that had a similar problem. It was fixed by
changing a configuration from

"Treat Invalid Watermarks With No Sender as Spam = spam"

To

"Treat Invalid Watermarks With No Sender as Spam = nothing"

However I do not know in which configuration file this option can be changed
to try it out. I am sort of a newbie in this.


-- 
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dangerous content by MailScanner, and is
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