Werk #18859: HTML email: Migrate old 'From' format

Component

Notifications

Title

HTML email: Migrate old 'From' format

Date

Oct 27, 2025

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.4.0p16 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

This change only affects you if Checkmk has been in use and was updated from version 1.6 onward.

Between versions 1.6 and 2.0, the format of the 'From' option changed from a string to a dictionary. Since no migration step existed for this old format, updates could fail when migrating to the new notification parameters. This has now been addressed.

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