Rename header in response and keep value

Hi, 

you just need an iRule in the following sequence : 

1- save the Header value that comes in HTTP Request in a variable : 
         set Req_header [HTTP::header value "email"]

2- Then insert Header value again under HTTP_Response event again. 

Please have a look in this article : https://community.f5.com/discussions/technicalforum/irule-to-add-the-server-header-in-the-http-response-please-help/113097

look at Kai_Wilke reply >> it will give u an insight of how doing this. 

Let me know if it doesn't worked with you.