New ask Hacker News story: Ask HN: How to send emails from a web services without being flagged as spam?

Ask HN: How to send emails from a web services without being flagged as spam?
3 by laurent123456 | 6 comments on Hacker News.
I'm developing a web service and will need to send a few emails, for example when a new user registers, to recover passwords, etc. Basically useful emails (not spam). So I'm wondering what's the best way to ensure they are received by the user? Right now I'm thinking of using OVH SMTP (ssl0.ovh.net) but I'm concerned the emails might end up being blocked. Any suggestion?

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