How to avoid spam with Yandex traffic rules?

Question

Mail server

There is a site, it sends letters to participants quite often, automatically (through the mail () function on the site, with configured smtp). All letters are in the same style. I tied it all to Yandex mail, mail of the form [email protected] (that is, mail not for the domain). Just recently, Yandex began to block all letters from the site, under the pretext of spam. They say the letters are of the same type and are sent more often than 200 letters a day.
How to solve this problem? Mail for a domain, from the same Yandex, will skip such a number? How to send clearly and without spam?

Answer 1

danyfir , transactional mailing services are the best for you.
We already mentioned mandrill and mailgun above, you can also look at sendgrid and sparkpost.
The cheapest way to send such letters is through Amazon SES, but there you need to get confused and configure the processing of bounces and other responses from mail servers using Amazon SNS, and this processing is already configured for the above services.