Werk #19781: Prevent check_mail crash for "Move all processed mesage to subfolder" option

Component

Checks & agents

Title

Prevent check_mail crash for "Move all processed mesage to subfolder" option

Date

Apr 15, 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
2.5.0b5 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p27 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

The active check check_mail can be configured to move mail messages from the inbox to a subfolder via the options "Forward mails as events to Event Console" > "Cleanup messages" > "Move all processed messages to subfolder".

For IMAP the copying of mails crashed when there were no mails available in the inbox.

This was previously already fixed in Werk 16630 but reintroduced.

This is now fixed again to skipping the copy command in case there are no mails given.

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