How to set up sending emails on gmail?

Question

Mail server

Hello.
There is a site with a form to send data to my gmail (not gmail for the domain). I am using phpmailer. Letters come from all mailboxes except mail.ru. As I understand it, you need to connect mail.ru for business (for the domain of my site with the form), configure mx, spf, dkim and dmarc so that the script can send me letters on behalf of the mailbox mail.ru, which the user specifies when filling out the form? Correct me if I'm wrong, and please show me the way to solve this problem.

Answer 1

What means "comes from all boxes"? Are you in From: substituting someone else's address to reply to it? You can’t do this, substitute the address in the Reply-To: field and not From:. In From: always specify an address that belongs to you and from a domain that you control.