What service can send letters inexpensively?

Question

Email

There is a subscriber base of 250,000 emails, the question arose of how to make a newsletter on them and that it was not expensive, after searching for answers in Google and Yandex, there were only more questions.
Let's say mandriil.com can do this with him? and why on some services, for example, 50,000 subscribers of 250,000 letters are indicated, while on others only letters are indicated?
It turns out that some can only send news and others only notifications?

Answer 1

mailgun - $120 for 250k emails per month.
I don't know what it's about being cheap, but they work sane.

Answer 2

Unisender

Answer 3

What kind of letters should be sent? Will it be mass mailings or transactional emails? This is the difference in tariffication, since the services are of different directions.
1) For mass mailings on your list, it is better to use Mailchimp. The price will depend entirely on the volume of your subscription list, but it certainly won’t be cheap.
2) For transactional emails (notifications, system emails, etc.) it's better to use Mandrill.

Answer 4

mailchimp