Hi, On Tue, 14.10.2008 at 10:38:19 +0200, Jimmy Spam <[EMAIL PROTECTED]> wrote: > Anybody can give me info about this or other recommend patch/method for > greylisting with qmail-ldap?
we're using qmail-ldap on OpenBSD, together with the bundled greylisting software (spamd(8)). There are other packages out there that may be more flexible, and we also found cases where greylisting does not work well, but in general, this is a good solution for us. The cases where it does not work typically involves either the foreign mail server not understanding 421 and bouncing the message (eg. Tobit), or large mail clusters which try to send the message through ever different members of their cluster, so they'll not get a whitelisting before their queue hold time is up. I've seen at least one instance of this problem with a British company (can't remember the name), who was literally sending from a whole class C network. If someone has an idea about how, and why, such mail clusters don't send one message through one IP, I'd like to hear the explanation. You typically only find out when mail does not arrive... YMMV. Kind regards, --Toni++
