How to send mail from server?

Question

linux

Good evening!
I haven't been able to fix the problem for hours now.
I installed postfix, connected it as it was said in the sendgrid guide ( https://sendgrid.com/docs/for-developers/sending-e... mail() returns true, but the mail does not come, what could be the problem?

Answer 1

And what's in the logs?

Answer 2

Check server and dns settings . Some servers won't even let you into spam.