In case someone more than me's been looking for an answer to the problem I had setting it up on Binero, here's how.
Problem: You want to use Cronjob instead of the built in Postie scheduler. You've tried setting it up in Binero's Cronjob menu but you can't get it to work.
Solution: Binero's been a little unhelpful by setting the little help-snippet in the command-line to "/home/xxxxx/". Instead, you should make it say:
wget http://yoursite.com/wp-content/plugins/postie/get_mail.php
Good luck!