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

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

Hi

I am using these 3 blacklists: sbl.spamhaus.org, list.dsbl.org and
bl.spamcop.net. However, a client is unable to send email using a Verizon
cell phone connection. Once I get his IP address, I can track down which
Blacklist is causing the problems.

Is there anyway to whitelist his IP address? (or his partial address?) Would
the access file work for this?

Thanks, Jerry

> From: Jerry Gapinski - Acuity Creative <jerry@xxxxxxxxxxxxxxxxxx>
> Reply-To: vps-mail@xxxxxxxxxxxx
> Date: Wed, 26 May 2004 10:59:05 -0500
> To: <vps-mail@xxxxxxxxxxxx>
> Subject: Re: [vps-mail] Dramatic increase of SPAM during last days
> 
> 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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