Phpmail function failed to send email-php Tutorial

An error occurred while sending the email using the phpmail function.

$ From = "123456@mail.de"; $ to = "654321@mail.de"; $ subject = "subject"; $ mailtext = "blablabla"; mail ($ to, $ subject, $ mailtext, "From: $ from ");

The mailbox does not respond at all. could you please advise me if there is any configuration problem? I always feel that there should be a password parameter for sending the mailbox, but I do not need to check it, I don't know why I'm so unsuccessful. forget to give me some tips.

Reply to discussion (solution)

The mail function can only use an email sending server that does not require user authentication.

Use phpmailer. Very simple.

No, the SMTP protocol is not enabled.

Later, phpmailer was used. thank you!