ConfigServer MailScanner by default enables maximum 30 entries per cPanel account in their Whitelist and Blacklist. To increase this setting, go to WHM » Plugins » ConfigServer MailScanner Front-End » Front-End Settings » End User Settings and under Maximum entries per account in their blacklist set new limits.
After increasing this value users can now add whitelist & blacklist entries as per new limits.
![Screen Shot 2020 06 23 at 09.57.51 - WARNING: [pool user_USERNAME] server reached pm.max_children setting (25), consider raising it](https://i0.wp.com/administrator.pejcic.rs/wp-content/uploads/2026/09/Screen-Shot-2020-06-23-at-09.57.51.png?resize=344%2C194&ssl=1 "WARNING: [pool user_USERNAME] server reached pm.max_children setting (25), consider raising it")
![2023 08 28 12 15 - node[175421]: pthread_create: Resource temporarily unavailable](https://i0.wp.com/administrator.pejcic.rs/wp-content/uploads/2023/08/2023-08-28_12-15.png?resize=344%2C194&ssl=1 "node[175421]: pthread_create: Resource temporarily unavailable")