Email sending limits and spam protection in WHM
How to set the max hourly email limit for VPS/Dedicated server through WHM:
1. Login to the WHM of the server as root 2. Click on File:Tweak settings.jpg Under the File:Serv config.jpg section 3. Click on the File:Mail tab.jpg tab 4. Scroll down to the File:Max hourly.jpg field 5. Change the field from "600" to whatever you wish (Keeping in mind the load on the server) 6. Scroll down and click File:Save.jpg