Werk #18299: postfix_mailq and nullmailer_mailq: Fix for mail queue size

Component

Checks & agents

Title

postfix_mailq and nullmailer_mailq: Fix for mail queue size

Date

Aug 18, 2025

Level

Trivial Change

Class

Bug Fix

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)
2.4.0p11	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

The reported mail queue size was wrong.

Previously, the agent reported queue size in kilobytes, but the Checkmk plugin read it as bytes. This caused inaccuracies.

With this werk, the agent consistently reports the size in bytes, so the plugin reads it correctly. Your mail queue metrics will be accurate again.