--- Herb Martin <[EMAIL PROTECTED]> wrote:
> > I am new to postfix and spamassassin, but we are already > > using greylist, and I liked a lot what you said here. > > > > How can I greylist messages by means of RBL checking? How > > should I setup Postfix to do that? > > > > Regards, > > Carlos. > > I am not a Postfix expert, and cannot really call myself > an Exim expert either but the strategy goes something like > this: > > During (various) SMTP ACL (Access Control Lists) run the > checks for things like RBL etc (this is easy in Exim) and > mark the results (in either an ACL variable or by adding > a header.*) > > * Header had the disadvantage of requiring the Greylist > check to wait until "SMTP DATA" time where the headers > are available when all we really need is > SenderIP-FromName-RCPT which are all available by > RCPT ACL time. > > When you have made all of your checks, and before checking > SpamAssassin, run the Greylist on any message that was > "flagged" above -- if the greylist returns true this is > where we tempfail (Defer in Exim) the message. The above can probably be done in Postfix with one or two restriction classes. http://www.postfix.org/postconf.5.html#smtpd_restriction_classes http://www.postfix.org/RESTRICTION_CLASS_README.html I'd be curious to hear if anyone else is using this kind of strategy. Thanks __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
