Am currently in a transition from exim to postfix as my MTA. Given size of my organization i limit how many emails a user can send out at once and create an exception for some users. Been able to limit number of emails using default_extra_recipient_limit = 25 smtpd_recipient_overshoot_limit = 30 How ever am having a challange on how to create an exception for some users who can send more than the defined limit.
policyd is supposed to be able to do that limiting. http://ngocquyetlinux.blogspot.com/2013/05/limit-mail-with-policyd.html There are policyd discussions on this forum.
