Werk #16630: Prevent check_mail crash for "Move to subfolder" option

Component Checks & agents
Title Prevent check_mail crash for "Move to subfolder" option
Date Mar 18, 2024
Checkmk Version 2.4.0b1 2.3.0b4 2.2.0p26
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Affected Editions
2.4.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0b4 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.2.0p26 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

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 to subfolder".

For IMAP the copying of mails crashed when there were no mails available in the inbox. This is fixed to skipping the copy command in case there are no mails given.

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