[Dovecot] help on writing a rule for perventing spam

[Giuliano Gavazzi]

On W 21 Jan, 2009, at 12:25 , Charles Marcus wrote:

> On 1/21/2009, Giuliano Gavazzi (dev+lists at humph.com) wrote:
>> you are much better off rejecting those even before seing the DATA,
>> if that address is in the envelope sender, or after, if it is only in
>> the From: message header.
>
> ? If he did that, then he wouldn't see his own messages to this list.

you are quite right. Indeed I never check the From: header, but the  
MAIL FROM. I extended the rule for the benefit of the list, and it  
came out wrong...

>
>
> But I agree that fighting this kind of spam is best done at the MTA
> level, and isn't really a dovecot (or sieve) issue.
>
> The postfix backscatter readme is a good start, esppecially is you are
> using postfix - and if you aren't, why aren't you? ;) ... but the
> concepts can be applied to any MTA...
>

I don't use postfix, because I use exim...

g