In Lite edition you can verify emails in Direct Mode max 10000 per contact list.

Here you can read help - Manual, see video, how use program - Video Tutorials and download free version - Download

You pay one time for lifetime key for one PC and limit 10000 per contact list. Also you have free support and update of program in current version.

Limit of verification on 1 Socks server - 20000 emails in day. You get Socks settings (IP address, port, username and password) of server. You can verify 600 000 emails in month.