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send PHP mail with Content-Type: multipart/alternative

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抹茶落季
抹茶落季 2020-12-11 19:37

I am trying to send a multipart mail that contains both html and plain text. This is also one of the ways to get through spam filters and to allow more people to read the ma

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  • 感情败类
    2020-12-11 19:42

    Here is the complete script without errors:

    <?php
error_reporting(-1);
ini_set("display_errors", "1");

$mailto = "email@enter-domainname-here.com";
$subject = "subject";

$boundary=md5(uniqid(rand()));
$header = "From:Info<".$mailto.">\n";
$header .= "Reply-To: ".$mailto."\n";
$header .= "MIME-Version: 1.0"."\n";
$header .= "Content-type: multipart/alternative; boundary=\"----=_NextPart_" . $boundary . "\"";

$message = "This is multipart message using MIME\n";

$message .= "------=_NextPart_" . $boundary . "\n";
$message .= "Content-Type: text/plain; charset=UTF-8\n";
$message .= "Content-Transfer-Encoding: 7bit". "\n\n";
$message .= "Plain text version\n\n";
$message .="------=_NextPart_" . $boundary . "\n";
$message .="Content-Type: text/html; charset=UTF-8\n";
$message .= "Content-Transfer-Encoding: 7bit". "\n\n";

$message .="<html>
<body>
<center>
<b>HTML text version</b>
</center>
</body>
</html>\n\n";
$message .= "------=_NextPart_" . $boundary . "--";

if(@mail($mailto, $subject, $message, $header))
{
print'message sent';
}
else
{
print"message was not sent";
}
?>
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  • 刺人心
    2020-12-11 19:43

    The line:

    $header .= 'Content-type: multipart/alternative;boundary=$boundary '."\n";

    Has the wrong quotes, so $boundary won't be expanded. Change to:

    $header .= "Content-type: multipart/alternative;boundary=$boundary\n";

    And like I said in the comments, in the message headers and the content section headers you should be using \r\n as the line break since that's what is defined in the RFC. Most MTAs will allow simply \n, but some will choke on the message, and some spam filters will count every RFC violation as a point towards your spam score.

    Using something like PHPMailer is a much better option because it formats everything perfectly by default, and abides by just about every single obscure, boring RFC.

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  • 小蘑菇
    2020-12-11 19:43

    Try this example https://github.com/breakermind/PhpMimeParser/blob/master/PhpMimeClient_class.php 

    $m = new PhpMimeClient();
// Add to
$m->addTo("email@star.ccc", "Albercik");
$m->addTo("adela@music.com", "Adela");
// Add Cc
$m->addCc("zonk@email.au");
// Add Bcc
$m->addBcc("boos@domain.com", "BOSS");    
// Add files inline
$m->addFile('photo.jpg',"zenek123");
// Add file
$m->addFile('sun.png');
// create mime
$m->createMime("Witaj!",'<h1>Witaj jak się masz? <img src="cid:zenek123"> </h1>',"Wesołych świąt życzę!","Heniek Wielki", "hohoho@domain.com");
// get mime
// $m->getMime();
// Show mime
echo nl2br(htmlentities($m->getMime()));
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  • 走了就别回头了
    2020-12-11 19:47

    I think you need quotes around the boundary string.

    try this:

    $header    .= 'Content-type: multipart/alternative; boundary="' . $boundary . '"\r\n';
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