today I had some issues I cannot point my finger upon. We use emails to create automatical servicecalls, but that did not work for several hours. Chekcing our Exchange server learned they were transfered to the unix server weher a sendmail-app is running.
In the logfiles I can see SMTP errors but I have no idea where to look for a solution. especially the following string "=?US-ASCII?B?IlRldXJmcywgUGF0cmlrIg==?= " gives me questions ?
I have pasted a small list of my logfile in attachment for you can see.