Load Balance SMTP for Exchange 2007 relay

I think SMTP does support X- like headers like HTTP does though. Here is an example of how to do it using .NET:

 

 

http://tools.ietf.org/html/rfc5321section-3.7.1

 

http://www.google.com/search?q=smtp+x+headers

 

http://www.add-in-express.com/forum/read.php?FID=5&TID=1480

 

 

The issue is that we can't use native iRule commands like SMTP::header to insert an SMTP header. I wonder if you could use a stream profile and STREAM::expression iRule to insert the original client IP in an X-Forwarded-For header...

 

 

Aaron