When GFI MailEssentials is installed on Microsoft Exchange 2007, the following Transport Agents are used to process the emails. Query keywords: Exchange 2007, Transport Agents GFI MailEssentials for Exchange/SMTP 14.GFI MailEssentials for Exchange/SMTP 12.GFI MailEssentials 2010 for Exchange/SMTP.The information in this article applies to: How to enable/disable the GFI MailEssentials Transport Agents