Title: check_mail_loop: now only deletes expected mails and not all mails matching a specific pattern
Level: 1
Component: checks
Compatible: compat
Version: 1.2.8b1
Date: 1450346972
Class: fix

If configured, the mail loop check deleted any received mails matching the pattern "Check_MK-Mail-Loop 1450346942 269".
With this fix it only deletes mails it was actually expecting and any left over mails older than 24 hours.
