PHP （sendmail / PHPMailer / …
PHP: mail - Manual 2020-7-24 · 1) The domain in the email used in the -f option in the php.ini sendmail parameter or in the mail() extra parameters field, needs to have a valid SPF record for the domain (in DNS as a "TXT" record type for sure and add an additional "SPF" type record if possible). PHP mail() Function - W3Schools 2020-7-24 · Return Value: Returns the hash value of the address parameter, or FALSE on failure.Note: Keep in mind that even if the email was accepted for delivery, it does NOT mean the email is actually sent and received! PHP Version: 4+ PHP Changelog: PHP 7.2: The headers parameter also accepts an array PHP 5.4: Added header injection protection for the headers parameter. How to Send Email using PHP mail() Function
2020-7-5
How to Send Email using PHP mail() Function 2020-7-24 · PHP mailer uses Simple Mail Transmission Protocol (SMTP) to send mail. On a hosted server, the SMTP settings would have already been set. The SMTP mail settings can be configured from “php.ini” file in the PHP installation folder.
一个简单的自动发送邮件系统(一) | - 软件开发网
注释： PHP 需要一个已安装且正在运行的邮件系统，以便使邮件函数可用。 所用的程序通过在 php.ini 文件中的配置设置进行定义。请在我们的 PHP Mail 参考手册阅读更多内容。 PHP 邮件 | 菜鸟教程 - RUNOOB.COM