SMTP service monitoring

An SMTP check connects to a mail server using the supplied account and measures the response. It checks the SMTP connection and authentication, without verifying that a message reaches a recipient's inbox.

Mail server

Enter the server, port, username and password required by your mail service. Configure the displayed TLS option according to the service's SMTP/STARTTLS endpoint. Keep Ignore TLS/SSL errors disabled for normal monitoring; enabling it bypasses certificate verification and can hide an invalid certificate.

If authentication fails, check the account, supported endpoint and access from the agent's network. RMON's email alert settings are separate from the mail server being monitored.

Create the check

1. Open Dashboard → Add check and select this check type.
2. Enter a recognizable name, complete the target fields above and select locations under Run checks from.
3. Click Next. On Settings, set the check interval and request timeout in seconds, retries and, if needed, a response-time threshold in milliseconds. A threshold of 0 disables slow-response warnings.
4. On Notifications, choose saved channels, priority and an optional runbook. Set the check group, description and enabled state.
5. Click Create check and verify a fresh result from each selected location.

See the illustrated check wizard, notification setup and result guide.