Werk #19764: HTML email notifications: Fix missing graphs for user notification rules

Component

Notifications

Title

HTML email notifications: Fix missing graphs for user notification rules

Date

Apr 28, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.6.0b1 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.5.0p1	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p29 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

When an HTML email notification rule defined in a user's personal notification rules matched, the log contained Failed to add graphs to mail. Continue without them. ('PARAMETER_GRAPHS_PER_NOTIFICATION') and no graphs were embedded in the resulting mail. Globally configured rules were not affected.

The mail plugin now falls back to the documented default of 5 graphs per notification (and 5 notifications with graphs in bulk mode) when the parameter is not propagated by the user rule, restoring the previous behaviour.

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