added images, extended Readme

README.md

@@ -1,3 +1,36 @@
 # Mailcow-CheckMK
 
-CheckMK Special Agent for Mailcow
+##CheckMK Special Agent for Mailcow
+
+Monitors various aspects of a Mailcow instance:
+Email domains with quota usage, number of mailboxes, number of aliases
+Mailboxes with quota usage, number of messages, last logins via IMAP/POP3/SMTP
+
+##Caveats:
+Tested only with dockerized versions of Mailcow
+Tested with Mailcow version 2022-07a and higher
+
+Please feel free to add other working environments via review.
+
+##Version history:
+
+2023/09/22:     1.1.4   Bugfix for the last bugfix :-)
+2023/09/22:     1.1.3   Bugfix for usage calculation if quota is not set (mailboxes)
+2023/09/10:     1.1.2   Checks for Solr status added
+2023/08/27:     1.0.0   Section "mailcow_mailboxes" completed
+2023/08/26:     0.2.2   Section "mailcow_domains" completed
+2023/08/21:     0.1.0   Section "mailcow_info" completed
+2023/08/20:     0.0.1   Special agent completed 
+
+##Examples how the services look like:
+
+Services Overview:
+![Services Overview](images/Mailcow-Services-Overview.png)
+
+Service Details:
+
+![Service Detail Info](images/Mailcow-Info-Details.png)
+
+![Service Detail Domain](images/Mailcow-Domains-Details.png)
+
+![Service Detail User](images/Mailcow-Users-Details.png)