Werk #15203: Rule "Check Email": Allow current host address/name as mail server

Component	Checks & agents
Title	Rule "Check Email": Allow current host address/name as mail server
Date	Jan 24, 2023
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.2.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.2.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.1.0p20 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Currently the mail server in the "Check Email" rule does not allow macros such as $HOSTNAME$ as input. To avoid repeated configuration for each host, the $HOSTADDRESS$ or $HOSTNAME$ can be selected in addition to the current input via the options "Use the address of the host for which the service is generated" and "Use the name of the host for which the service is generated" respectively. If a $HOSTADDRESS$ or $HOSTNAME$ was used in a previous version, the corresponding option will be selected during the update.

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