Re: [vps-mail] Dramatic increase of SPAM during last days

[Jerry Gapinski - Acuity Creative <jerry@xxxxxxxxxxxxxxxxxx>]

Hi,

What are peoples experiences with false positives using black lists?

Thanks, Jerry

> From: "Ben Lanford" <ben@xxxxxxxxxxxxx>
> Reply-To: vps-mail@xxxxxxxxxxxx
> Date: Wed, 26 May 2004 15:37:21 -0000
> To: <vps-mail@xxxxxxxxxxxx>
> Subject: Re: [vps-mail] Dramatic increase of SPAM during last days
> 
> Martin Fischer <martin.fischer@xxxxxxxxxxxxx> said:
> 
>> Hi,  
>>  
>> we noticed a dramatic increase of SPAM during last days but we did not
> change filters (SA 2.63)? Any hints welcome!
> 
> If you have the luxury of being able to filter all incoming mail (i.e., for
> all users), I have found using DNS blacklists in the sendmail.cf file
> eliminates a great deal of incoming SPAM during sendmail's SMTP
> conversation--before it makes it onto the server to be processed by
> SpamAssassin or Procmail.
> 
> The hard part is choosing which of the numerous blacklists is right for you.
> 
> Within the past day or two someone recommended SpamCop. Using their blacklist
> can be as simple as adding the following line to your sendmail macro
> configuration file:
> 
> FEATURE(`dnsbl', `bl.spamcop.net')dnl
> 
> I'm sure others on this list have their own favorites.
> 
> After you implement DNSBLs, monitor your mail log closely (searching for the
> string "check_" to make sure the blacklist's definition of spam isn't more
> agressive than yours).
> 
> You can read more about DNSBLs in the Bat Book (3rd ed., pp. 295-98), as well
> as in the cf/README (/usr/share/sendmail/cf/README on VPS2; on VPS1, after
> vinstalling sendmail, see ~/usr/local/sendmail/cf/README). I see that one
> subscriber to this list (I think) wrote a page on DNSBLs at http://
> www.technoids.org/dnsbl.html
> 
> --  
> Bennett Lanford 
> ben@xxxxxxxxxxxxx
> 
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