Hi all,

In summary, here is what I am trying to do: 

Have exchange read from a database containing email addresses and depending on if it finds a match or not, insert a custom X-Header into the message. 

I know with 0ffice 365, you can define a rule based on recipient and insert an X-Header in the message.  Manual process to define recipients, but think this would be a start if similar functionality existed in an onsite Exchange 2013 implementation. 

Can someone tell me wether this functionality exists natively within Exchange 2013 (I have been told no)  or if they know of a third party utility that would allow this to occur? 

Thanks for your time and feedback. 

Hi xungan,

Thank you for your question.

I dont know if my understanding is wrong, if I misunderstand, please be free to let me know.

We could create transport rule to meet you requirement by the following link:

https://social.technet.microsoft.com/forums/exchange/en-US/ffd7a9ce-8f32-46e0-9dc6-4405e55e76aa/adding-custom-xheaders-to-outgoing-emails  

We could use the script to achieve by the following link:

https://msdn.microsoft.com/en-us/library/office/dn596091(v=exchg.150).aspx

If there are any questions regarding this issue, please be free to let me know.

Best Regard,

Jim