Very popular web-based tool Microsoft Remote Connectivity Analyzer now has new great feature: Message Analyzer
Now with Message Analyzer in Microsoft Remote Connectivity Analyzer you can easly check SMTP message headers which contains many informations which allows you to determine the origins of a message and how it made its way through one or more SMTP servers to its destination.
To use Message Analyzer, all you need to do is copy message headers from a message and paste them in the Message Analyzer tab on the RCA web site.
English 
polski