Dear Friends, how are you?

I have a problem with my project, 
I need to send massive emails (about 100,000 emails per day), I would like to know how I could do this with Pega, we have 2 problems.

1st Problem - We developed here a sending test, and PEGA started sending emails, one at a time, after 7 emails, the server crashed.
2nd problem - We need an email account that can send mass emails.

I would like to know your opinion, if you have had similar problems, and how you solved them. Thank you very much.