PHP 下的 Socket 简单编程（三）-- 发送邮件

爱被打了一巴掌 2023-08-17 15:38 173阅读 0赞

发送邮件使用的是 SMTP 协议 (简单邮件传输协议), 用于邮件服务器和邮件发送方之间.

邮件的发送过程大致如下:

1.  在邮件发送方和邮件服务器间建立 TCP 连接, 服务器响应 220 表示连接成功;
2.  发送方通过HELO命令标识自己的身份. 服务器响应 250 表示准备接收邮件;
3.  发送方通过AUTH LOGIN命令进行登录, 以 163 邮件服务器为例, 登录账号分别是 base64 编码过的邮箱账号和 163 的客户端授权码. 服务器响应 334 表示账号验证通过, 响应 235 表示授权码验证通过;
4.  发送方通过MAIL FROM命令指定邮件的发送者. 服务器响应 250 表示成功;
5.  发送方通过RCPT TO命令指定邮件接收地址, 服务器响应 250 表示成功;
6.  发送方通过DATA命令发送邮件, 邮件内容包括邮件头和邮件正文部分. 服务器响应 250 表示成功;
7.  发送方通过QUIT命令断开连接.

Windows 下可以通过 telnet 发送邮件.

邮件头的基本格式为:

Date: Feb 7 20:30:39 2007 // 发送日期
 From: "发送者" <发送者邮箱>
 To: "接受者" <接收者邮箱>
 Subject: 邮件标题
 Content-Type: text/plain; // 邮件正文类型

邮件头主要配置项:

<table style="border-spacing:0px;"> 
 <tbody> 
 <tr> 
 <td style="vertical-align:bottom;border:1px solid #dddddd;">字段</td> 
 <td style="vertical-align:bottom;border:1px solid #dddddd;">意义</td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;border:1px solid #dddddd;">From</td> 
 <td style="vertical-align:top;border:1px solid #dddddd;">邮件创建者的邮件地址</td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;border:1px solid #dddddd;">To</td> 
 <td style="vertical-align:top;border:1px solid #dddddd;">邮件目的地</td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;border:1px solid #dddddd;">Sender</td> 
 <td style="vertical-align:top;border:1px solid #dddddd;">邮件发送者</td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;border:1px solid #dddddd;">Reply-to</td> 
 <td style="vertical-align:top;border:1px solid #dddddd;">邮件回复地址</td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;border:1px solid #dddddd;">Cc</td> 
 <td style="vertical-align:top;border:1px solid #dddddd;">邮件抄送人</td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;border:1px solid #dddddd;">In-Reply-To</td> 
 <td style="vertical-align:top;border:1px solid #dddddd;">邮件正被回复</td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;border:1px solid #dddddd;">Data</td> 
 <td style="vertical-align:top;border:1px solid #dddddd;">邮件创建的时间</td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;border:1px solid #dddddd;">Subject</td> 
 <td style="vertical-align:top;border:1px solid #dddddd;">邮件主题</td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;border:1px solid #dddddd;">Comments</td> 
 <td style="vertical-align:top;border:1px solid #dddddd;">邮件的其他说明</td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;border:1px solid #dddddd;">Keywords</td> 
 <td style="vertical-align:top;border:1px solid #dddddd;">邮件的关键字</td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;border:1px solid #dddddd;">Bcc</td> 
 <td style="vertical-align:top;border:1px solid #dddddd;">邮件的密件抄送人邮件地址</td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;border:1px solid #dddddd;">Message-ID</td> 
 <td style="vertical-align:top;border:1px solid #dddddd;">邮件的标识符</td> 
 </tr> 
 </tbody> 
</table>

邮件内容的具体格式和结构, 可以参考: [https://help.aliyun.com/knowledge\_detail/51584.html][https_help.aliyun.com_knowledge_detail_51584.html]

#### **示例一: 发送简单邮件** ####

**sendEmail.php**

header('Content-type: text/html; charset=utf-8');
 $server = 'smtp.163.com';
 $errno = null;
 $error = null;
 // 设置邮件头
 $email = 'Date: ' . date('j F G:i:s Y', time()) . "\r\n"; // 发送日期
 $email .= 'From: "哪里多" <******@163.com>' . "\r\n"; // 发送者
 $email .= "To: \"二柱子\" <******@qq.com>\r\n"; // 接收者
 $email .= "Subject: 测试邮件\r\n"; // 邮件标题
 $email .= "Content-Type: text/plain; charset=UTF-8\r\n\r\n"; // 邮件内容类型，邮件头和正文间空一行分割
 
 $email .= "邮件正文\r\n\r\n\r\n"; // 正文内容结束后空两行
 
 
 $email .= ".\r\n"; // 邮件内容结束后以 . 命令标识结束
 try
 {
 // fsockopen()函数: 建立一个网络连接或Unix套接字, 返回一个文件句柄, 可以使用文件操作函数操作返回的资源
 $sockHandle = fsockopen($server, 25, $errno, $error, 60);
 if($sockHandle === false)
 {
 exit('无法建立连接');
 }
 $response = fgets($sockHandle);
 if(strpos($response, '220') !== 0)
 {
 exit('连接邮件服务器失败');
 }
 fwrite($sockHandle, "HELO test-user\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 exit('helo命令执行失败');
 }
 fwrite($sockHandle, "AUTH LOGIN\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '334') !== 0)
 {
 exit('AUTH LOGIN命令执行失败');
 }
 fwrite($sockHandle, base64_encode("******@163.com") . "\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '334') !== 0)
 {
 exit('账号验证失败');
 }
 // 163邮箱的客户端授权码
 fwrite($sockHandle, base64_encode("******") . "\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '235') !== 0)
 {
 exit('密码验证失败');
 }
 fwrite($sockHandle, "MAIL FROM: <******@163.com>\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 exit('mail from命令执行失败');
 }
 fwrite($sockHandle, "RCPT TO: <******@qq.com>\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 exit('rcpt to命令执行失败');
 }
 fwrite($sockHandle, "DATA\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '354') !== 0)
 {
 exit('data命令执行失败');
 }
 fwrite($sockHandle, $email);
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 exit('发送邮件失败');
 }
 fwrite($sockHandle, "QUIT\r\n");
 echo '发送邮件成功' . PHP_EOL;
 fclose($sockHandle);
 }catch(Exception $e)
 {
 var_dump($e->getMessage());
 var_dump($e->getTrace());
 var_dump($e->getLine());
 fclose($sockHandle);
 }

通过命令行执行脚本文件:

![Alt text][]

成功接收到邮件:

![Alt text][]

#### **示例二: 发送携带单个附件的邮件** ####

邮件携带附件时, 邮件头的格式类似 HTTP 请求中的上传文件时请求头的格式, 都需要在头部附加说明附件的内容和其他信息.

**sendEmailWithAttachment.php**

header('Content-type: text/html; charset=utf-8');
 $server = 'smtp.163.com';
 $errno = null;
 $error = null;
 // 设置邮件头
 $email = 'Date: ' . date('j F G:i:s Y', time()) . "\r\n";
 $email .= 'From: "哪里多" <***@163.com>' . "\r\n";
 $email .= "To: \"二柱子\" <***@qq.com>\r\n";
 $email .= "Subject: 测试邮件\r\n";
 $email .= "Content-Type: multipart/mixed; boundary=----delimiter1----\r\n\r\n"; // 与post方式上传附件类似，需设定段体边界。邮件头和正文间空一行分割
 
 $email .= "------delimiter1----\r\n"; // 段体开始边界格式：--{$boundary}
 $email .= "Content-Type: multipart/alternative; boundary=----delimiter2----\r\n\r\n"; // 邮件正文段体边界
 
 $email .= "------delimiter2----\r\n"; // 邮件正文部分段体
 $email .= "Content-Type: text/plain; charset=UTF-8\r\n\r\n";
 
 $email .= "邮件正文\r\n"; // 正文内容结束后空两行
 $email .= "------delimiter2------\r\n\r\n"; // 正文部分结束边界，段体结束边界格式：--{$boundary}--
 
 $email .= "------delimiter1----\r\n"; // 邮件附件段体设置，发送多个附件时，重复设置该部分段体
 $email .= "Content-Type: application/octet-stream; name=\"1542533630(1).jpg\"\r\n";
 $email .= "Content-Transfer-Encoding: base64\r\n";
 $email .= "Content-Disposition: attachment; filename=\"test.jpg\"\r\n\r\n"; // 附件下载名称
 
 $file = base64_encode(file_get_contents('./1542533630(1).jpg'));
 $email .= $file . "\r\n\r\n";
 
 $email .= "------delimiter1------\r\n"; // 邮件实体设置结束边界
 $email .= ".\r\n"; // 邮件内容结束后以 . 命令表示邮件内容设置完成
 try
 {
 // fsockopen()函数: 建立一个网络连接或Unix套接字, 返回一个文件句柄, 可以使用文件操作函数操作返回的资源
 $sockHandle = fsockopen($server, 25, $errno, $error, 60);
 if($sockHandle === false)
 {
 exit('无法建立连接');
 }
 $response = fgets($sockHandle);
 if(strpos($response, '220') !== 0)
 {
 exit('连接邮件服务器失败');
 }
 fwrite($sockHandle, "HELO test-user\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 exit('helo命令执行失败');
 }
 fwrite($sockHandle, "AUTH LOGIN\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '334') !== 0)
 {
 exit('AUTH LOGIN命令执行失败');
 }
 fwrite($sockHandle, base64_encode("***@163.com") . "\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '334') !== 0)
 {
 exit('账号验证失败');
 }
 // 163邮箱的客户端授权码
 fwrite($sockHandle, base64_encode("***") . "\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '235') !== 0)
 {
 exit('密码验证失败');
 }
 fwrite($sockHandle, "MAIL FROM: <***@163.com>\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 exit('mail from命令执行失败');
 }
 fwrite($sockHandle, "RCPT TO: <***@qq.com>\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 exit('rcpt to命令执行失败');
 }
 fwrite($sockHandle, "DATA\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '354') !== 0)
 {
 exit('data命令执行失败');
 }
 fwrite($sockHandle, $email);
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 exit('发送邮件失败');
 }
 fwrite($sockHandle, "QUIT\r\n");
 echo '发送邮件成功' . PHP_EOL;
 fclose($sockHandle);
 }catch(Exception $e)
 {
 var_dump($e->getMessage());
 var_dump($e->getTrace());
 var_dump($e->getLine());
 fclose($sockHandle);
 }

通过命令行运行脚本:

![Alt text][]

邮箱成功接收到邮件:

![Alt text][]

#### **示例三: 发送携带多个附件的邮件** ####

**sendEmailWithMultiAttachment.php**

header('Content-type: text/html; charset=utf-8');
 $server = 'smtp.163.com';
 $errno = null;
 $error = null;
 // 设置邮件头
 $email = 'Date: ' . date('j F G:i:s Y', time()) . "\r\n";
 $email .= 'From: "哪里多" <***@163.com>' . "\r\n";
 $email .= "To: \"二柱子\" <***@qq.com>\r\n";
 $email .= "Subject: 急报\r\n";
 $email .= "Content-Type: multipart/mixed; boundary=----delimiter1----\r\n\r\n"; // 邮件头和正文间空一行分割
 
 $email .= "------delimiter1----\r\n";
 $email .= "Content-Type: multipart/alternative; boundary=----delimiter2----\r\n\r\n";
 
 $email .= "------delimiter2----\r\n";
 $email .= "Content-Type: text/plain; charset=UTF-8\r\n\r\n";
 
 $email .= "见信速回\r\n"; // 正文内容结束后空两行
 $email .= "------delimiter2------\r\n\r\n";
 
 $email .= "------delimiter1----\r\n"; // 附件1段体
 $email .= "Content-Type: application/octet-stream; name=\"baobiao1.jpg\"\r\n";
 $email .= "Content-Transfer-Encoding: base64\r\n";
 $email .= "Content-Disposition: attachment; filename=\"baobiao1.jpg\"\r\n\r\n"; // 附件下载名称
 
 $file = base64_encode(file_get_contents('./1542533630(1).jpg'));
 $email .= $file . "\r\n\r\n";
 
 $email .= "------delimiter1----\r\n"; // 附件2段体
 $email .= "Content-Type: application/octet-stream; name=\"baobiao2.jpg\"\r\n";
 $email .= "Content-Transfer-Encoding: base64\r\n";
 $email .= "Content-Disposition: attachment; filename=\"baobiao2.jpg\"\r\n\r\n"; // 附件下载名称
 
 //$file = base64_encode(file_get_contents('./1542533630(1).jpg'));
 $email .= $file . "\r\n\r\n";
 
 $email .= "------delimiter1------\r\n";
 $email .= ".\r\n"; // 邮件内容结束后以 . 命令标识结束
 try
 {
 // fsockopen()函数: 建立一个网络连接或Unix套接字, 返回一个文件句柄, 可以使用文件操作函数操作返回的资源
 $sockHandle = fsockopen($server, 25, $errno, $error, 60);
 if($sockHandle === false)
 {
 exit('无法建立连接');
 }
 $response = fgets($sockHandle);
 if(strpos($response, '220') !== 0)
 {
 exit('连接邮件服务器失败');
 }
 fwrite($sockHandle, "HELO test-user\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 exit('helo命令执行失败');
 }
 fwrite($sockHandle, "AUTH LOGIN\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '334') !== 0)
 {
 exit('AUTH LOGIN命令执行失败');
 }
 fwrite($sockHandle, base64_encode("***@163.com") . "\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '334') !== 0)
 {
 exit('账号验证失败');
 }
 // 163邮箱的客户端授权码
 fwrite($sockHandle, base64_encode("***") . "\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '235') !== 0)
 {
 exit('密码验证失败');
 }
 fwrite($sockHandle, "MAIL FROM: <***@163.com>\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 exit('mail from命令执行失败');
 }
 fwrite($sockHandle, "RCPT TO: <***@qq.com>\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 exit('rcpt to命令执行失败');
 }
 fwrite($sockHandle, "DATA\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '354') !== 0)
 {
 exit('data命令执行失败');
 }
 fwrite($sockHandle, $email);
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 echo $response;
 exit('发送邮件失败');
 }
 fwrite($sockHandle, "QUIT\r\n");
 echo '发送邮件成功' . PHP_EOL;
 fclose($sockHandle);
 }catch(Exception $e)
 {
 var_dump($e->getMessage());
 var_dump($e->getTrace());
 var_dump($e->getLine());
 fclose($sockHandle);
 }

通过命令行运行脚本:

![Alt text][]

邮箱接收到邮件:

![Alt text][]

如果需要设置抄送项, 在邮件头中配置抄送项Cc即可, 如:

Cc: <抄送人1@qq.com>, <抄送人2@163.com>

然后通过执行命令RCPT TO设置抄送人:

fwrite($sockHandle, "RCPT TO: <抄送人2@163.com>\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 echo $response;
 exit('抄送命令执行失败');
 }

**退信的处理**

邮件内容不规范, 或相同内容重复发送时, 可能导致退信, 发送失败.

1.  如果是重复内容反复发送导致的退信, 更换发送人账号即可.
2.  也可以通过将发件人添加到收件人解决退信问题. 此时邮件头中To的配置项为:

To: 收件人1 <***@qq.com>, 发件人 <***@163.com>\r\n

在通过命令设置发件人时, 通过反复执行RCPT TO命令, 设置多个收件人.

fwrite($sockHandle, "RCPT TO:<收件人1@qq.com>\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 exit('收件人1命令执行失败');
 }
 fwrite($sockHandle, "RCPT TO: <发件人@163.com>\r\n");
 $response = fgets($sockHandle);
 if(strpos($response, '250') !== 0)
 {
 exit('收件人2命令执行失败');
 }

**参考文章**

[　　https://blog.csdn.net/kerry0071/article/details/28604267][https_blog.csdn.net_kerry0071_article_details_28604267]

[　　https://blog.csdn.net/manux/article/details/1504757][https_blog.csdn.net_manux_article_details_1504757]

[　　https://blog.csdn.net/xx\_xxxxxxxxxx1120/article/details/79777124][https_blog.csdn.net_xx_xxxxxxxxxx1120_article_details_79777124]

[　　https://www.cnblogs.com/hbgs/p/9812503.html][https_www.cnblogs.com_hbgs_p_9812503.html]

[　　https://help.aliyun.com/knowledge\_detail/51584.html][https_help.aliyun.com_knowledge_detail_51584.html]

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转载于:https://www.cnblogs.com/fxyy/p/11257320.html

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[https_blog.csdn.net_kerry0071_article_details_28604267]: https://blog.csdn.net/kerry0071/article/details/28604267
[https_blog.csdn.net_manux_article_details_1504757]: https://blog.csdn.net/manux/article/details/1504757
[https_blog.csdn.net_xx_xxxxxxxxxx1120_article_details_79777124]: https://blog.csdn.net/xx_xxxxxxxxxx1120/article/details/79777124
[https_www.cnblogs.com_hbgs_p_9812503.html]: https://www.cnblogs.com/hbgs/p/9812503.html