is there a limit to mass mail?

Is there a limit number of mails  per day I can send via mass mail? I want to send a mass mail to 15000 people.i have 50 groups of 300 mails each. Can I? I  use the freeware program, and i have a microsoft exchange account. Please respond me in order, to buy the full package of em client.

Hello Christianna,

There is no limitation on the number of mails sent per day in eM Client (also depends on the mail server, if there are any limitations on number of mails per day), however eM Client free license is intended for personal use only. If you wish to use eM Client for commercial purposes, you will need a Pro license, which is available for purchase on our website.

-Dave