From: Brian Evans - Postfix List on
On 5/28/2010 2:23 PM, Klaus Engelmann wrote:
> I would like to know if it is advisable to keep a final PERMIT at the
> end of the smtpd_recipient_restrictions.

A permit is implied at the end of each restriction class.
So adding or removing an explicit permit from the end has no noticeable
effect.

Brian