IMAP/POP Monitor

The IMAP/POP Monitor verifies that your mail server is reachable for clients. This is useful for detecting authentication and connectivity issues that impact inbox access.

How it works

We connect to your IMAP or POP endpoint and validate that the service responds.
If the server cannot be reached or does not respond in time, the check fails.

Configuration

Basic settings

Hostname: Hostname only, without protocol or path.
Port: Optional (commonly 143/993 for IMAP, 110/995 for POP).
Check interval and Timeout.
Status: active, maintenance, disabled.

Advanced settings

Protocol selection (IMAP vs POP) and other advanced options (e.g. encryption/auth requirements) can be configured via the monitor settings.

Monitoring locations

IMAP/POP checks run from our monitoring locations. You can restrict execution using Allowed Check Countries (monitor-level) or by using the customer-level defaults.

Port-only mode (no credentials)

By default (Check Mode: protocol), the monitor logs in to your IMAP or POP endpoint and validates the connection. Set Check Mode to tcp to skip authentication entirely. The monitor only opens a bare TCP connection to hostname:port, without an IMAP/POP handshake or login, and no credentials are required or stored. Use tcp mode when you only need to confirm the port is reachable.

Unlike SSH, SMTP, and FTP, IMAP/POP requires an explicit Port when Check Mode is tcp. Since there's no way to infer IMAP vs. POP without one, the monitor can't fall back to a protocol default port.