Werk #18236: check_mail_loop: add subject into body

Component Checks & agents
Title check_mail_loop: add subject into body
Date Jun 25, 2025
Level Trivial Change
Class New Feature
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.5.0b1
Not yet released
Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

With this Werk, the check_mail_loop monitoring check now includes the same information in both the email subject and body. Previously the message body remained empty.

This change addresses two important issues: * Emails with empty bodies are often flagged as suspicious by email security solutions and may be blocked or quarantined * When emails are processed through SMS gateways that forward only the email body content as text messages, an empty body would break the mail loop monitoring

By duplicating the subject content in the message body, we gain compatibility with both email security systems and SMS gateway integrations while preserving all existing functionality.

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