IBM Domino Server | configuration Postfix Fallback Nagios

Configuration Postfix – IBM Domino Server Fallback Nagios

1.) Install Postfix at Domino Server

2.) Configure Postfix Interfaces and Network at Domino Server

Domino Postfix main.cf

–      inet_interfaces = 192.168.xxx.xxx,localhost (on which interface postfix should listen)

–      mynetworks = 192.168.xxx.xxx/24 (from which network postfix should accept connections). Example: 0.0.0.0/24 from everyone (be careful with that!)

3.) Configure Postfix Ports | 9267 instead 25 because Domino has 25

Domino Postfix master.cf

–      # smtp inet …. (smtp port 25 deactivate because it´s reserved for domino)

–      9267 inet … (Postfix communication through Port 9267)

4.) Restart Postfix at Domino Server

service postfix restart

5.) Domino iptables adjust + restart (add Port 9267)

Service iptables restart

6.) Configure Postfix Interfaces and Network at Nagios Server

Nagios Postfix main.cf

–      relayhost = 192.168.xxx.xxx (IP Adresse from Domino Servers)

–      fallback_relay = 192.168.xxx.xxx:9267 (IP Adresse and Port from Postfix Server)

7.) Configure Postfix Ports at Nagios Server

Nagios Postfix master.cf

–      smtp inet …. (smtp port 25 should be used ad nagios server)

8.) Restart Postfix at Nagios Server

service postfix restart