Posts Required to Send PM module for IPB 3.1.3+
Date: 13 June 2011 | Posted by: Cib3rBoy
This hook will set a number of posts that users must have to send new PMs. You can set the required number of posts, including if you would like to display this number in the message, and which user groups will be affected.
Demo:
http://hide4.me/2qd
See full article