Just want to touch base with the folks that know more about this subject then I do currently.

 

The way that I have my mail servers setup is as following

 

Mail Server 1 -  This mail server handles all out going SMTP traffic.  It will also process all incoming traffic and NAT the message to mail server 2. (DKIM is installed and has been tested)

 

Mail Server 2 – has the physical mail boxes as well as webmail.  (Does not have DKIM install)

 

My question is this, should I still have DKIM install on mail server 2, even though it does not physically send any messages.

 

The reason I ask, is last night my blackberry went nuts because of 200 bounce back messages.

 

Thanks for you assistance.

 

Ron Shaw