Nagios Support Forum

I am using Nagios Core 4.4.6 on CentOS 7. Everything was fine while I was using sendmail for mail notification but recently my manager asked me to use postfix instead (Gmail SMTP with app password). There probably might have been an issue with the configuration. If anyone could guide me, would really appreciate. Worked fine on Ubuntu but CentOS seems a bit tricky. Also, mail body is blank, doesn't show any information.
Thanks in advance!

Hey @LamyaImam

There may be a few things that are blocking this, the configuration is probably the first place to start. I will link some documentation that may help. If you alter the configuration and it still doesn't work I would next try checking to see if your firewall is the issue. Let us know if this helps.
https://assets.nagios.com/downloads/nag ... ios-XI.pdf