We have an environment in which there is an email security appliance that runs for spam filtering on-premises for our IBM Lotus mail infrastructure. All the outgoing and incoming mails pass through the ESA. I want to understand how will the SEG integrate in such an environment and where will it be placed? If we look from the internet, will it be placed 1. before the ESA facing the internet ( SEG--->ESA---> Mail Server) or 2. after the ESA (between ESA and the mail server --- ESA --> SEG--> Mail Server)? What will be the mobile settings and what change will need to be done at the ESA and mail server if there needs to be? Can anybody help me understand this scenario??