I used to send 170k emails in one campaign/ twice a
month with elastic email. This provider was recommended to me by Thomas of Hubuco.
Any email providers will ban you from sending emails through them if you get a lot of complaints and bounce
rate. Also, elastic email will require you to buy an IP from them
for better delivery rate which is like $27 a month in one IP. You would be able to configure a lot of “IT” things here from your domain.
That 170k emails were captured during our "vote for "
campaigns in 3 months… but after having huge amount of bounce rate, I had to verify those email through Hubuco. and it went down to 70k emails. So those voters
emails were fake and we had to audit the winner and disqualify.
to make the long story short, it’s very affordable compared to mailchimp, but it works like one. Try it.