[Mimedefang] Sender 'callback' Checks?

[Jonas Eckerman]

Simon Standley wrote:

> are any of you doing 'callback' checks on sender address, either inside MimeDefang, or using smf-sav milter, or anything like that?

If you are talking about verifying sender addresses by doing SMTP 
callouts to MX servers, you should know that this may get your 
server blacklisted since it's considered abusive by many and 
because it may well make your server connect to spam traps.

Regards
/Jonas
-- 
Jonas Eckerman, FSDB & Fruktträdet
http://whatever.frukt.org/
http://www.fsdb.org/
http://www.frukt.org/