Is it possible to limit the users to send total email in a month/day.
I am trying to enforced marketing users to send newsletter according to their assigned quota.
Example
1. user1@example.com: can send only 100 emails a day & 3000 emails in a month.
2. user2@example.com: can send only 200 emails a day & 6000 emails in a month.
VPS: Centos6
MTA: postfix
Best Answer
The tool you need is the cluebringer otherwise known as policyd. It will allow you to assign quotas of all sorts (and many other functions), and importantly, allows you to count users by more immutable criteria, like their SASLUsername, allowing you to be fairly confident that people won't be able to sneak around limits by changing sending email.