Re: Initial mod_smtpd code.

[Paul A Houle]

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 127.0.0.2 is 
listed by sbl-xbl.spamhaus.org"

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.