How to limit the number of emails sent by each user (prevent spammer) Last Modified: Jul 25, 2013, 1:51 pm The current exim.pl files have the ability to track who is sending email. There is an option to turn on a limit for how many emails are sent by a particular user. To enable this limit, simply add the number of emails you'd likely to allow per day to the /etc/virtual/limit file. For most cases 200 emails should be enough for any users. Once the limit file has a number greater than 0, the exim.pl will start to count the number of emails sent by a user. In the /etc/virtual/usage directory, there will be 2 types of files. ' username ' and ' username .bytes'. The bytes file will store how large each email was. The total sum of the bytes in that files will give the amount of outgoing smtp bandwidth used that day (this is always enabled). The other file ('username') is used to count the number of emails sent. Ea...