Skip to main content

Email Header IpAddress GeoIP report Addin for Outlook and Outlook on the Web in Office365

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 against a normal gray email that was forward to my Office365 Mailbox from Gmail

For a quick diagnostic this information is pretty useful as it tells you where the email traversed and the Org information generally will tell you the cloud providers being used. Doing this on email in my junk email folder that where of a nefarious nature showed that the these emails had transitied through  countries that are the usual suspects in this type of activity.

I've hosted the code up on GitHub here https://github.com/gscales/gscales.github.io/tree/master/MailGeoRoutes so the addin can be added straight from the Repo if you want to try it using (MyAddins - Custom Addins) and

https://gscales.github.io/MailGeoRoutes/MailGeoRoutes.xml

This uses REST to get the header so will only work on Office365 but the same thing could also be done using EWS for OnPrem servers from Exchange 2013 onward.


Popular posts from this blog

Downloading a shared file from Onedrive for business using Powershell

I thought I'd quickly share this script I came up with to download a file that was shared using One Drive for Business (which is SharePoint under the covers) with Powershell. The following script takes a OneDrive for business URL which would look like https://mydom-my.sharepoint.com/personal/gscales_domain_com/Documents/Email%20attachments/filename.txt This script is pretty simple it uses the SharePoint CSOM (Client side object Model) which it loads in the first line. It uses the URI object to separate the host and relative URL which the CSOM requires and also the SharePointOnlineCredentials object to handle the Office365 SharePoint online authentication. The following script is a function that take the OneDrive URL, Credentials for Office365 and path you want to download the file to and downloads the file. eg to run the script you would use something like ./spdownload.ps1 ' https://mydom-my.sharepoint.com/personal/gscales_domain_com/Documents/Email%20attachments/filena

A walk-though using the Graph API Mailbox reports in Powershell

Quite recently the Reporting side of the Graph API has moved in GA from beta, there are quite a number of reports that can be run across various Office365 surfaces but in this post I'm going to focus on the Mailbox related ones. Accessing Office365 Reports using Powershell is nothing new and has been available in the previous reporting endpoint  https://msdn.microsoft.com/en-us/library/office/jj984326.aspx however from the end of January many of these cmdlets are now being depreciated in favour of the Graph API  https://msdn.microsoft.com/en-us/library/office/dn387059.aspx . Prerequisites  In comparison to using the Remote PowerShell cmdlets where only the correct Office365 Admin permissions where needed, to use the new Graph API reports endpoint you need to use OAuth for authentication so this requires an Application Registration  https://developer.microsoft.com/en-us/graph/docs/concepts/auth_overview  that is then given the correct oAuth Grants to use the Reports EndPoin

How to test SMTP using Opportunistic TLS with Powershell and grab the public certificate a SMTP server is using

Most email services these day employ Opportunistic TLS when trying to send Messages which means that wherever possible the Messages will be encrypted rather then the plain text legacy of SMTP.  This method was defined in RFC 3207 "SMTP Service Extension for Secure SMTP over Transport Layer Security" and  there's a quite a good explanation of Opportunistic TLS on Wikipedia  https://en.wikipedia.org/wiki/Opportunistic_TLS .  This is used for both Server to Server (eg MTA to MTA) and Client to server (Eg a Message client like Outlook which acts as a MSA) the later being generally Authenticated. Basically it allows you to have a normal plain text SMTP conversation that is then upgraded to TLS using the STARTTLS verb. Not all servers will support this verb so if its not supported then a message is just sent as Plain text. TLS relies on PKI certificates and the administrative issue s that come around certificate management like expired certificates which is why I wrote th
All sample scripts and source code is provided by for illustrative purposes only. All examples are untested in different environments and therefore, I cannot guarantee or imply reliability, serviceability, or function of these programs.

All code contained herein is provided to you "AS IS" without any warranties of any kind. The implied warranties of non-infringement, merchantability and fitness for a particular purpose are expressly disclaimed.