CentOS 8.x Zabbix Email notifications setup

To receive email notifications about issues from Zabbix use:

Configure outgoing emails from Zabbix server using appropriate method eg CentOS 8.x postfix send email through relay or smarthost with smtp authentication
Login into Zabbix Web UI using Admin account
Go to Administration -> Media Types
Click on 'Email'
If email through local machine is configured properly you can specify SMTP server as localhost and port as 25. If the email via local machine is not configured you can try giving SMTP server details along with authentication at this screen
Click Update to update SMTP / Email settings.
Go to Configuration -> Actions
Against "Report problems to Zabbix administrators" click on Disabled to toggle it to Enabled
Edit Admin profile settings using top right corner "Profile settings" option.
Under Media Tab, Add a new email ID for admin where alerts should be received
Once added properly the email ID should be visible under "Media" tab for admin user profile
Test notifications by Adding a new host with IP which is not active / not reachable over network from Zabbix using "Template Module ICMP Ping". See whether alerts are received for host being down. Delete host after testing.

Refer:

Anonymous