SMTP mail server monitor software - ActiveXperts Network Monitor
ActiveXperts Network Monitor is a software solution you need to scan your network servers, workstations and devices for failures or irregularities. With ActiveXperts Network Monitor, you can identify issues and fix unexpected problems before your others even know they've happened. ActiveXperts Network Monitor maximizes network availability by monitoring all aspects of your servers, workstations, switches, routers, printers and any other devices. It can also detect temperature, humidity and other environmental aspects in your server rooms.
ActiveXperts Network Monitor checks an SMTP mail server by connecting on a remote TCP port (default: port 25) and perform a challenge/reponse
An ActiveXperts Network monitor SMTP Mail Server check requires the following parameters:
Host - Hostname or IP address of the server to be monitored;
Port - TCP port number of the SMTP protocol. Default: 25;
Send command when connected - As soon as connection is established, send a command. By default, no command string will be sent;
Response must include string - when connected, optionally send a command. Then wait for the response. The default response for SMTP servers includes: '200';
Timeout - Number of milliseconds before the check will timeout. Usually, a connection to the server will be established within 1 second. However, some slow/busy server need more time. Recommended value is 7000 milliseconds.