php在centos上如何配置SMTP邮件发送

在CentOS上配置PHP以通过SMTP发送邮件，您需要完成以下步骤：

安装并配置Postfix作为本地邮件传输代理（MTA）：

a. 安装Postfix：

sudo yum install postfix

b. 配置Postfix：

sudo vi /etc/postfix/main.cf

在文件中添加以下内容：

myhostname = mail.example.com
mydomain = example.com
myorigin = $mydomain
inet_interfaces = all
mydestination = $myhostname, localhost.$mydomain, $mydomain
relayhost =
inet_protocols = ipv4
mynetworks = 127.0.0.0/8
home_mailbox = Maildir/
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination
smtpd_relay_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination
smtpd_tls_security_level = encrypt
smtpd_tls_cert_file = /etc/pki/tls/certs/smtpd.crt
smtpd_tls_key_file = /etc/pki/tls/private/smtpd.key
smtpd_use_tls = yes
smtp_tls_note_starttls_offer = yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

c. 替换mail.example.com和example.com为您的实际域名。

d. 重启Postfix服务：

sudo systemctl restart postfix

安装并配置PHPMailer：

a. 使用Composer安装PHPMailer：

composer require phpmailer/phpmailer

b. 创建一个新的PHP文件（例如send_email.php），并添加以下代码：

<?php
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use PHPMailer\PHPMailer\Exception;

require 'vendor/autoload.php';

$mail = new PHPMailer(true);

try {
    // Server settings
    $mail->SMTPDebug = SMTP::DEBUG_SERVER;                      // Enable verbose debug output
    $mail->isSMTP();                                            // Send using SMTP
    $mail->Host       = 'mail.example.com';                     // Set the SMTP server to send through
    $mail->SMTPAuth   = true;                                   // Enable SMTP authentication
    $mail->AuthType   = SMTP::AUTH_LOGIN;                        // Use SMTP AUTH LOGIN
    $mail->Port       = 587;                                    // TCP port to connect to; use 587 if you have set `SMTP_TLS` above
    $mail->SMTPSecure = SMTP::ENCRYPTION_STARTTLS;            // Enable implicit TLS encryption
    $mail->Username   = 'your_email@example.com';               // SMTP username
    $mail->Password   = 'your_password';                        // SMTP password

    // Recipients
    $mail->setFrom('your_email@example.com', 'Mailer');
    $mail->addAddress('recipient@example.com', 'Recipient Name');     // Add a recipient

    // Content
    $mail->isHTML(true);                                        // Set email format to HTML
    $mail->Subject = 'Here is the subject';
    $mail->Body    = 'This is the HTML message body in bold!';
    $mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

    $mail->send();
    echo 'Message has been sent';
} catch (Exception $e) {
    echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}

c. 替换your_email@example.com、your_password和recipient@example.com为您的实际信息。

运行PHP脚本发送邮件：

php send_email.php

如果一切配置正确，您应该能够通过SMTP发送邮件。