Customer want to enable TLS in the SMTP

Based on our testing it appears that with the iRule we can successfully establish a secure TLS session between the Internet (MS Office 365 cloud) and the DMZ load balancer. However, the client needs the TLS session to extend all the way to the xchange servers. the LB can be configured to subsequently request/establish a TLS session to the pool members as well. We need to provide a response to the client fairly quickly