Werk #20007: Fix Check email migration of Cleanup messages option

Component

Setup

Title

Fix Check email migration of Cleanup messages option

Date

May 18, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.5.0p4	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p30	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Previously, Check email rules that used "Forward mails as events to Event Console" with "Cleanup messages" set to "Delete all processed messages" would fail to migrate when updating. The update process would log errors like:

WARNING: Invalid rule configuration detected (Ruleset: active_checks:mail,
Title: Check email, ...)
WARNING: Config creation for active check mail failed on localhost: 3 validation
errors for Parameters

The affected rules would stop generating monitoring commands, causing the corresponding services to go stale.

This has been fixed. Rules that were already partially migrated with the incorrect internal value are also corrected automatically on the next config update.

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