SPF for avoiding newsletter FPs

2006-04-24 Thread Ramprasad
Hi,
  We get considerable number of newsletter mails with "spammy" content.
How do people tackle Fp's from newsletters ? typically the stock
newsletters , the bank promotional newsletters etc 
I would like know if this is possible ( I am using SA3.1 + Mailscanner +
postfix ) 
1) Maintain a list of newsletters ( this would grow with time )
2) For each of these newlsetter mails if their SPF records match give a
high negative score. 

Atleast those newsletters from domains who *have* SPF records will not
have problems.

Thanks
Ram





Re: SPF for avoiding newsletter FPs

2006-04-24 Thread Matt Kettler
Ramprasad wrote:
> Hi,
>   We get considerable number of newsletter mails with "spammy" content.
> How do people tackle Fp's from newsletters ? typically the stock
> newsletters , the bank promotional newsletters etc 
> I would like know if this is possible ( I am using SA3.1 + Mailscanner +
> postfix ) 
> 1) Maintain a list of newsletters ( this would grow with time )
> 2) For each of these newlsetter mails if their SPF records match give a
> high negative score. 
>
> Atleast those newsletters from domains who *have* SPF records will not
> have problems.

whitelist_from_spf is your friend here. This effectively allows you to
whitelist mail based on From address, but only if it passes SPF.

http://spamassassin.apache.org/full/3.1.x/dist/doc/Mail_SpamAssassin_Plugin_SPF.html