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From Paul A Houle <>
Subject Re: Initial mod_smtpd code.
Date Wed, 20 Jul 2005 13:56:11 GMT
Jem Berkes wrote:

>I could also start work on a mod_smtpd_dnsbl if the mentors feel that is 
>worthwhile? This would look up a connecting IP address against a blacklist 
>and return a descriptive string to mod_smtpd if the client should be 
>rejected with an error: "550 5.7.1 Email rejected because is 
>listed by"
>I'd also like to include support for RHSBL, a newer type of listing by 
>domain names from the envelope sender address. That's used by a growing 
>number of projects.
    Overall blacklists aren't that effective and cause a lot of false 
positives.  They may make sense in the case of something like 
SpamAssassin which uses a blacklist in conjunction with other false 
positives,  but by themselves they really aren't a responsible way of 
dealing with the spam problem.  I think it's better to discourage "worst 
practices" than to sucumb to plugin mania.

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