Feedback emails are not coming, what could be the problem?

Question

Email

Hello everyone, I need to add feedback to my site. I found a ready-made code on the Internet, changed the e-mail to my own, well, I did everything as it should, but for some reason the letters do not come, what could be the problem, maybe in the host? Hosting timeweb.ru

Answer 1

1) The mail function does not work on the server (we are looking for the code for checking the mail function in the search engine)
2) Incorrect data for SMTP
3) Security is not configured for the SMTP mailbox (relevant for gmail)
4) Crooked code
5) Incorrect message headers or missing
6) . ..until I figured it out