How to send a bunch of emails and not in the spam folder?

Question

PHP

The essence is this, the project implies that it leaves an application and, according to its criteria, letters are sent to all users in a certain group, a message is sent. How can this not be spammed? If you do not use the services. Maybe some headlines, something else to light?

Answer 1

https://support.google.com/mail/answer/81126?hl=en

Answer 2

Well, there is a mailwizz script, you will have your own mailing service, you can configure users by groups and everything else, but you will need an SMTP server for this, that is, register VDS and already configure them, then the risk of getting into spam is small, but with Google mail somehow does not work very well