FortiGate SNMP Monitoring not working

Hello Johannes,

thank you for the last response it solved my problem.
But now I would like to monitor our Fortimail but I get the default snmp error:

Starting job…
SNMP scan failed: Cannot fetch system description OID .1.3.6.1.2.1.1.1.0. Please check your SNMP configuration. Possible reason might be: Wrong credentials, wrong SNMP version, Firewall rules, etc.
Completed.

This is my snmp configuration I can’t understand why here it isn’t working…
Ping from the monitoring server to the fortimail is working (it’s the same configuration like on the fortigate where it works without problems)

Maybe do you have an idea?