I have a linux server, it's CentOS 6.8 which is hosting a LAMP and a mail server. By debugging, I found that everytimes the cronjob (executing a PHP file) starts running for a while, my mail server's service stopped working without any error message or log information.
- The cronjob creates many TCP connections to other websites
- The mail server's server creates many TCP connection too because it has to send email out.
I want my mail server's service not to be stopped. If you can guide me to fix this, please let me know and I will be happy to pay you.