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Werk #18927: Notifications: handle undefined mail variables

Component Notifications
Title Notifications: handle undefined mail variables
Date Oct 21, 2025
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.5.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.4.0p15 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

Mail notifications failed when the following variables were undefined:

  • PREVIOUSHOSTHARDSTATE
  • PREVIOUSSERVICEHARDSTATE

These variables now default to UNKNOWN when undefined.

No action is required from users to benefit from this improvement.

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