What is the most simple and reliable SMTP server can choose to send notifications from the site?

Until recently used the service from Yandex, but there constantly having troubles with the settings
Think about finding alternatives. What would you recommend?
June 10th 19 at 15:08
3 answers
June 10th 19 at 15:10
Solution
https://www.mailgun.com/
Used on several military projects, no problems.
thank you) checked, everything works. While going to stop there. - Jessyca.McDermott commented on June 10th 19 at 15:13
June 10th 19 at 15:12
I usually use Google smtp. Special problems did not arise.
June 10th 19 at 15:14
Work in a large company developer, and it so happened that over a sufficiently long period of time, we changed the services for emails for various reasons, stopped at sendgrid.comand this is the best option. Working with them now for a year via the API + all the emails stored in them, but they support SMTP. Can they keep the emails as newsletters (from which the user can unsubscribe) and the notification. Can also advise SparkPost, but it is harder and more expensive

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