Glen's Exchange and Office 365 Dev Blog

Something that can be useful from time to time when looking at email delivery issues or email threats is to be able to see the Geographical regions that an email has traversed in its delivery. Usually this information gets stored in the Email Header in the received headers but also depending on the client and services being used the Source IpAddress of the client and other intermediaries may get written in other properties. Because I needed something last week to do this and couldn't find any other addins to do this I created a pretty simple Outlook addin that Gets the headers from a Message using the REST API in Office365 Uses a RegEx to get all the IPAddresses from that header Uses a Set in JavaScript to then de duplicate these IPAddresses Then I used one of the many free GeoIP web services out there to query each of the returned IPAddresses from the Regex matches and finally display the result in a table but to Outlook For example here is what it returns where run aga