PORTS cannot be shared on the same IP ADDRESS.
So long as you setup SmarterMail on a separate IP address, you should be able to make it all work together.
Remember, whether you have a public IP address on the SBS server, or you are running a STATIC DHCP address and using NAT and mapping to a public IP address via your router or firewall, you must have a separate PUBLIC IP address as well.
Bruce Barnes
ChicagoNetTech Inc
brucecnt@comcast.net
Phonr: (773) 491-9019
Phone: (224) 444-0169
E-Mail and DNS Security Specialist
Network Security Specialist
Customer Service Portal: https://portal.chicagonettech.com
Website: https://www.ChicagoNetTech.com
Security Blog: http://networkbastion.blogspot.com/
Web and E-Mail Hosting, E-Mail Security and Consulting