Werk #4278: check_mail_loop: Added missing Date header to sent mails

Component Checks & agents
Title check_mail_loop: Added missing Date header to sent mails
Date Jan 12, 2017
Checkmk Edition Checkmk Raw (CRE)
Checkmk Version 1.2.8p16 1.4.0b1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

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