This topic describes how to send emails using PHP through the SMTP protocol.
Send emails using PHP through the SMTP protocol
Method 1: Use the external dependency phpmailer. You can download the following files from GitHub: PHPMailer.php, Exception.php, and SMTP.php.
Modify the Chinese encoding in PHPMailer.php:
public $CharSet = self::CHARSET_ISO88591;
Change to:
public $CharSet = self::CHARSET_UTF8;
Sample code for sending emails:
<?php
require 'PHPMailer.php';
require 'Exception.php';
require 'SMTP.php';
$mail = new PHPMailer(true);
try {
//Server settings
$mail->CharSet='UTF-8';
$mail->SMTPDebug = SMTP::DEBUG_SERVER;
$mail->isSMTP();
$mail->Host = 'ssl://smtpdm.aliyun.com'; //Direct Mail server
$mail->Port = 465; //Port
//$mail->Host = 'smtpdm.aliyun.com';
//$mail->Port = 80;
//$mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS; //Enable encryption
$mail->SMTPAuth = true; //Authorization
$mail->Username = 'test***@example.net'; //Sender address
$mail->Password = '*******'; //SMTP password
//Recipients
$mail->setFrom('test***@example.net', 'Mailer'); //The sender address to display. You can configure sending on behalf of another address.
$mail->addAddress('test1***@example.net', 'name'); //Recipient and nickname
//$mail->addAddress('test1***@example.net'); //The nickname is optional.
//$mail->addAddress('test2***@example.net', 'name2');//To add multiple recipients, add another line.
$mail->addReplyTo('test1***@example.net', 'Information');//Reply-to address
$mail->addCC('test2***@example.net');//CC recipient
$mail->addBCC('test3***@example.net');//BCC recipient
// // JSON
// $createJson = [
// "Version" => "1.0",
// "Unsubscribe" => [
// "LinkType" => "default", // Default policy
// "FilterLevel" => "mailfrom_domain" // Filter at the email domain level
// ],
// "OutboundIp" => [
// "IpPoolId" => "exxxxxxe-4xx0-4xx3-8xxa-7xxxxxxxxxxxxf" // Replace this with your IP pool ID
// ]
// ];
// // Convert to a JSON string
// $jsonString = json_encode($createJson, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
// // Base64 encoding
// $base64Trace = base64_encode($jsonString);
// // Add a custom message header
// $mail->addCustomHeader('X-AliDM-Settings', $base64Trace);
//Attachments
//$mail->addAttachment('C:/Users/Documents/test.jpg'); //Add an attachment
$mail->addAttachment('C:/Users/Documents/test.jpg', 'new.jpg'); //The name is optional.
//Content
$mail->isHTML(true); //HTML format
$mail->Subject = 'Subject test';
$mail->Body = 'Test content';
//$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';
$mail->Sender = 'test***@example.net';
echo 'Message has been sent';
$mail->send();
echo 'Message has been sent';
} catch (Exception $e) {
echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}
?>Method 2: Use the external dependency email.class.php
<?php
require 'email.class.php';
$mailto='Recipient address';
$mailsubject="Test email";
$mailbody='This is the email content';
$smtpserver = "smtpdm.aliyun.com";
$smtpserverport = 80;
// $smtpserver= "ssl://smtpdm.aliyun.com";
// $smtpserverport = 465;
$smtpusermail = "Sender address";
// The sender's account, enter the sender address configured in the console, such as test***@@example.net
$smtpuser = "Sender account";
// The password required when accessing the SMTP service (set in the console by selecting the sender address)
$smtppass = "***";
$mailsubject = "=?UTF-8?B?" . base64_encode($mailsubject) . "?=";
$mailtype = "HTML";
//Optional, set reply-to address
$smtpreplyto = "***";
$smtp = new smtp($smtpserver, $smtpserverport, true, $smtpuser, $smtppass);
$smtp->debug = false;
$cc ="";
$bcc = "";
$additional_headers = "";
//Set the sender name, users can customize the name.
$sender = "Sender";
$smtp->sendmail($mailto,$smtpusermail, $mailsubject, $mailbody, $mailtype, $cc, $bcc, $additional_headers, $sender, $smtpreplyto);
?>The content of email.class.php needs to be modified
$header .="Reply-To: ".$replyToAddress."\r\n";//where $replyToAddress is the parameter $smtpreplyto
Note:
email.class.php is an external dependency. You need to download it from the internet yourself.
mailto: recipient's email address.
smtpuser: complete sender address.
email.class.php reference example
<?php
/**
* email smtp (support php7)
*
*/
class Smtp
{
/* Public Variables */
public $smtp_port;
public $time_out;
public $host_name;
public $log_file;
public $relay_host;
public $debug;
public $auth;
public $user;
public $pass;
/* Private Variables */
private $sock;
/* Constractor */
function __construct($relay_host = "", $smtp_port = 80,$auth = false,$user,$pass)
{
$this->debug = FALSE;
$this->smtp_port = $smtp_port;
$this->relay_host = $relay_host;
$this->time_out = 30; //is used in fsockopen()
$this->auth = $auth;//auth
$this->user = $user;
$this->pass = $pass;
$this->host_name = "localhost"; //is used in HELO command
$this->log_file = "";
$this->sock = FALSE;
}
/* Main Function */
function sendmail($to, $from, $subject, $body, $mailtype, $cc, $bcc, $additional_headers, $fromUser, $replyToAddress)
{
$mail_from = $this->get_address($this->strip_comment($from));
$body = preg_replace("/(^|(\r\n))(\.)/", "\1.\3", $body);
$header = "MIME-Version:1.0\r\n";
if($mailtype=="HTML"){
$header .= "Content-Type:text/html; charset=utf-8\r\n";
}
$header .= "To: ".$to."\r\n";
if ($cc != "") {
$header .= "Cc: ".$cc."\r\n";
}
$header .= "From: $fromUser<".$from.">\r\n";
$header .= "Subject: ".$subject."\r\n";
$header .= "Reply-To: ".$replyToAddress."\r\n";
$header .= $additional_headers;
$header .= "Date: ".date("r")."\r\n";
$header .= "X-Mailer:By Redhat (PHP/".phpversion().")\r\n";
list($msec, $sec) = explode(" ", microtime());
$header .= "Message-ID: <".date("YmdHis", $sec).".".($msec*1000000).".".$mail_from.">\r\n";
// To enable the email tracking feature, use the following code to set the tracking link in the message header. For more information about the prerequisites and constraints, see Enable the data tracking feature.
//$header .= "Content-Transfer-Encoding: quoted-printable\r\n";
//$header .= "X-AliDM-Trace: ". base64_encode(json_encode(['TagName'=>'user_created_tag','OpenTrace'=>"1"]))."\r\n";
$TO = explode(",", $this->strip_comment($to));
if ($cc != "") {
$TO = array_merge($TO, explode(",", $this->strip_comment($cc)));
}
if ($bcc != "") {
$TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));
}
$sent = TRUE;
foreach ($TO as $rcpt_to) {
$rcpt_to = $this->get_address($rcpt_to);
if (!$this->smtp_sockopen($rcpt_to)) {
$this->log_write("Error: Cannot send email to ".$rcpt_to."\n");
$sent = FALSE;
continue;
}
if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) {
$this->log_write("E-mail has been sent to <".$rcpt_to.">\n");
} else {
$this->log_write("Error: Cannot send email to <".$rcpt_to.">\n");
$sent = FALSE;
}
fclose($this->sock);
$this->log_write("Disconnected from remote host\n");
}
return $sent;
}
/* Private Functions */
function smtp_send($helo, $from, $to, $header, $body = "")
{
if (!$this->smtp_putcmd("HELO", $helo)) {
return $this->smtp_error("sending HELO command");
}
//auth
if($this->auth){
if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) {
return $this->smtp_error("sending HELO command");
}
if (!$this->smtp_putcmd("", base64_encode($this->pass))) {
return $this->smtp_error("sending HELO command");
}
}
if (!$this->smtp_putcmd("MAIL", "FROM:<".$from.">")) {
return $this->smtp_error("sending MAIL FROM command");
}
if (!$this->smtp_putcmd("RCPT", "TO:<".$to.">")) {
return $this->smtp_error("sending RCPT TO command");
}
if (!$this->smtp_putcmd("DATA")) {
return $this->smtp_error("sending DATA command");
}
if (!$this->smtp_message($header, $body)) {
return $this->smtp_error("sending message");
}
if (!$this->smtp_eom()) {
return $this->smtp_error("sending <CR><LF>.<CR><LF> [EOM]");
}
if (!$this->smtp_putcmd("QUIT")) {
return $this->smtp_error("sending QUIT command");
}
return TRUE;
}
function smtp_sockopen($address)
{
if ($this->relay_host == "") {
return $this->smtp_sockopen_mx($address);
} else {
return $this->smtp_sockopen_relay();
}
}
function smtp_sockopen_relay()
{
$this->log_write("Trying to ".$this->relay_host.":".$this->smtp_port."\n");
$this->sock = @fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);
if (!($this->sock && $this->smtp_ok())) {
$this->log_write("Error: Cannot connenct to relay host ".$this->relay_host."\n");
$this->log_write("Error: ".$errstr." (".$errno.")\n");
return FALSE;
}
$this->log_write("Connected to relay host ".$this->relay_host."\n");
return TRUE;
}
function smtp_sockopen_mx($address)
{
$domain = preg_replace("/^.+@([^@]+)$/", "\1", $address);
if (!@getmxrr($domain, $MXHOSTS)) {
$this->log_write("Error: Cannot resolve MX \"".$domain."\"\n");
return FALSE;
}
foreach ($MXHOSTS as $host) {
$this->log_write("Trying to ".$host.":".$this->smtp_port."\n");
$this->sock = @fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);
if (!($this->sock && $this->smtp_ok())) {
$this->log_write("Warning: Cannot connect to mx host ".$host."\n");
$this->log_write("Error: ".$errstr." (".$errno.")\n");
continue;
}
$this->log_write("Connected to mx host ".$host."\n");
return TRUE;
}
$this->log_write("Error: Cannot connect to any mx hosts (".implode(", ", $MXHOSTS).")\n");
return FALSE;
}
function smtp_message($header, $body)
{
fputs($this->sock, $header."\r\n".$body);
$this->smtp_debug("> ".str_replace("\r\n", "\n"."> ", $header."\n> ".$body."\n> "));
return TRUE;
}
function smtp_eom()
{
fputs($this->sock, "\r\n.\r\n");
$this->smtp_debug(". [EOM]\n");
return $this->smtp_ok();
}
function smtp_ok()
{
$response = str_replace("\r\n", "", fgets($this->sock, 512));
$this->smtp_debug($response."\n");
if (!preg_match("/^[23]/", $response)) {
fputs($this->sock, "QUIT\r\n");
fgets($this->sock, 512);
$this->log_write("Error: Remote host returned \"".$response."\"\n");
return FALSE;
}
return TRUE;
}
function smtp_putcmd($cmd, $arg = "")
{
if ($arg != "") {
if($cmd=="") $cmd = $arg;
else $cmd = $cmd." ".$arg;
}
fputs($this->sock, $cmd."\r\n");
$this->smtp_debug("> ".$cmd."\n");
return $this->smtp_ok();
}
function smtp_error($string)
{
$this->log_write("Error: Error occurred while ".$string.".\n");
return FALSE;
}
function log_write($message)
{
$this->smtp_debug($message);
if ($this->log_file == "") {
return TRUE;
}
$message = date("M d H:i:s ").get_current_user()."[".getmypid()."]: ".$message;
if (!@file_exists($this->log_file) || !($fp = @fopen($this->log_file, "a"))) {
$this->smtp_debug("Warning: Cannot open log file \"".$this->log_file."\"\n");
return FALSE;
}
flock($fp, LOCK_EX);
fputs($fp, $message);
fclose($fp);
return TRUE;
}
function strip_comment($address)
{
$comment = "/\([^()]*\)/";
while (preg_match($comment, $address)) {
$address = preg_replace($comment, "", $address);
}
return $address;
}
function get_address($address)
{
$address = preg_replace("/([ \t\r\n])+/", "", $address);
$address = preg_replace("/^.*<(.+)>.*$/", "\1", $address);
return $address;
}
function smtp_debug($message)
{
if ($this->debug) {
echo $message;
}
}
}
?>