Posting by email. Mail server set up question.

I’ve installed the latest 2.0.2 release and everything is fine. I have the post by mail settings entered correctly (I think). But the email posts just end up in the pop3 mailbox and don’t get any further.

I assume that the information about Cron jobs in the documentation is old and not required(?) as the set up page makes no mention of dong anything additional.

Assuming this is true how long would aemail post take to appear? Immediately? After 15 minutes or after a day?

Any help appriciated.