The program generates about 60000 messages per hour. It can split your mail lists, use fractional sending option to send messages only to a part of the list, and choose only messages within the specified date range.
The program provides you with all the tools you need to manage the records in your database. It can import and export data, create new tables and columns, and perform a lot of other operations with your database structure and data.
Using the Execute Program tags option you may start the programs that you are already using for your needs, as well as expand your PostCast abilities immensely. PostCast can forward data about your order to the program that would process your orders.