Hello, before upgrading php from version 5 to version 7, the mail () function sent messages without errors, after I installed php7, var_dump (mail (parameters)) returns false, and the letter is not sent, and no errors are output, Except for php, no additional packages for sending emails are installed on the machine.
How can I solve this problem? I need to configure the usual sending of letters, so that users of my site can reset passwords, no additional methods of incoming letters and so on. i don't need