将通过mail（）函数从哪个电子邮件地址发送

Question

I am making a email form but from which email adress is the mail send?

Thanks!

Answer 1

from whatever email adress you specify as sender:

bool mail ( string $to , string $subject , string $message [, string $additional_headers [, string $additional_parameters ]] )

for headers, you can add:

$additional_headers.= "From: [e-mail]";    

But help yourself and use PHPMailer along with a well configured, dedicated SMTP-Server to send mails: https://github.com/PHPMailer/PHPMailer

(You'll run into lot of issues otherwhise)