Often you are forced to analyze mail headers. If this is not part of your daily tasks, it’s difficult to “read” the header information.
MXToolBox.com offers a free header analyzer which performs a graphical preparation of the mail header which can be used for documentation and further analyzing. You can follow the different steps of the sent mail as well as e.g. spamfilter or mailserver header additions:
Here you can find the header analyzer:
An alternative Tool to analyze the E-Mail header comes from google: