What is the best anonymous bulk mailer in your opinion?

Hi,

I've got a huge list of millions of email addresses. What is the best tool for sending anonymous bulk emails?
I've heared about Send Safe Mailer, but it's very expensive.

Hope you can help me with your strategies! How you monetize a huge list of emails?

Thanks in advance...

 

Use a online one such as mailerfree.

 

I think this is called spamming?

 

Taht might not be called spamming if the list is opt-in