In Professional edition you can send unlimited messages in Direct Mode (built-in SMTP), via your SMTP servers, Socks servers and Webscript. Also can use Bounce Manager, Mail Merge, Opt In/Out service, List Tools and External Datasourses.

In Standard edition you can send unlimited messages in Direct Mode (built-in SMTP) and via your SMTP servers. Also can use Bounce Manager, Mail Merge and Opt In/Out service.

In Lite edition you can send unlimited messages only via your SMTP servers and limit 10000 contacts for all lists. Also can use Mail Merge and Opt In/Out service.