PHPMailer - mails going straight to spam

Whenever I send an automated e-mail using PHPMailer, it goes straight into the spam folder in Gmail. I have tried finding a solution to this myself but I don't know enough about e-mails and e-mail headers.

Can anyone explain why this is happening?

PHP Code is below, followed by the headers that show up from the receiver.

Thanks!

$mail = new PHPMailer;
$mail->From = "chrisxenongroup@server.xenonacademy.org.uk";
$mail->FromName = 'Xenon Group Academy';
$mail->AddAddress($email);
$mail->Subject = "Your Xenon Group Academy login details";
$mail->IsHTML(true);
$mail->Body = "<html><body><h3>Welcome to the Xenon Group Academy</h3><p>The Academy is an online system that will allow you to access course materials, manage your assignments and network with other Xenon Group students.</p>
<p>To access your account, go to <a href='http://www.xenonacademy.org.uk'>www.xenonacademy.org.uk</a> and use the following details to login.</p><p><pre>E-mail:            $email</pre></p><p><pre>Password:       " . mysqli_real_escape_string($conn, $_POST['password']) . "</pre></p><br /><br /><p>Once you have logged in, we would recommend changing your password to something secure and easy to remember. You can also change your login e-mail address if you need to.</p><p>Welcome to the Academy, and good luck with your qualification!</p></body></html>";
$mail->Send();



Delivered-To: xxxxxxxxxx@gmail.com
Received: by 10.49.109.71 with SMTP id hq7csp68808qeb;
        Thu, 23 May 2013 07:27:28 -0700 (PDT)
X-Received: by 10.180.37.243 with SMTP id b19mr25275110wik.12.1369319247650;
        Thu, 23 May 2013 07:27:27 -0700 (PDT)
Return-Path: <chrisxenongroup@server.xenonacademy.org.uk>
Received: from server.xenonacademy.org.uk (vps69719724.123-vps.co.uk. [46.32.233.107])
        by mx.google.com with ESMTPS id n5si14506537wic.103.2013.05.23.07.27.26
        for <xxxxxxxxxx@gmail.com>
        (version=TLSv1 cipher=RC4-SHA bits=128/128);
        Thu, 23 May 2013 07:27:27 -0700 (PDT)
Received-SPF: neutral (google.com: 46.32.233.107 is neither permitted nor denied by best guess record for domain of chrisxenongroup@server.xenonacademy.org.uk) client-ip=46.32.233.107;
Authentication-Results: mx.google.com;
       spf=neutral (google.com: 46.32.233.107 is neither permitted nor denied by best guess record for domain of chrisxenongroup@server.xenonacademy.org.uk) smtp.mail=chrisxenongroup@server.xenonacademy.org.uk
Received: by server.xenonacademy.org.uk (Postfix, from userid 10000)
    id DFBAAE0288; Thu, 23 May 2013 15:27:24 +0100 (BST)
To: xxxxxxxxxx@gmail.com
Subject: Your Xenon Group Academy login details
X-PHP-Originating-Script: 10000:class.phpmailer.php
Date: Thu, 23 May 2013 15:27:24 +0100
From: Xenon Group Academy <chrisxenongroup@server.xenonacademy.org.uk>
Message-ID: <10c74f9a6380f353cb1bdfb4e7c22f52@www.xenonacademy.org.uk>
X-Priority: 3
X-Mailer: PHPMailer 5.2.6 (https://github.com/PHPMailer/PHPMailer/)
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/html; charset=iso-8859-1

<html><body><h3>Welcome to the Xenon Group Academy</h3><p>The Academy is an online system that will allow you to access course materials, manage your assignments and network with other Xenon Group students.</p>
<p>To access your account, go to <a href='http://www.xenonacademy.org.uk'>www.xenonacademy.org.uk</a> and use the following details to login.</p><p><pre>E-mail:            xxxxxxxxxx@gmail.com</pre></p><p><pre>Password:     xxxxxxxx</pre></p><br /><br /><p>Once you have logged in, we would recommend changing your password to something secure and easy to remember. You can also change your login e-mail address if you need to.</p><p>Welcome to the Academy, and good luck with your qualification!</p></body></html>

Thanks!

Filippos Karapetis

This does sound more like a configuration issue with your mail server and/or your DNS server. Your mail server does not appear to be "trusted" enough, so you don't get enough "positive" points from GMail (and mail clients). I notice that you're using postfix as your mailer... Have you configured it properly?

I would suggest you configure postfix first. For example, here's a guide on how to do it in CentOS:

http://wiki.centos.org/HowTos/postfix

Second, you should add an SPF record to your DNS server:

http://en.wikipedia.org/wiki/Sender_Policy_Framework

Third, it would be good to have a reverse lookup entry for your server:

http://en.wikipedia.org/wiki/Reverse_DNS_lookup

You will need to do the above and some more to make sure that clients don't flag your mail as spam, and you don't get blacklisted

Here's a good list of things to do to avoid getting blacklisted:

https://www.supportsages.com/prevent-your-mailip-from-getting-marked-as-spamblacklisted-a-few-tips/

I use PHP Mailer a lot and haven't had any trouble with emails being sent to spam (yet!). I wonder if it might be anything to do with your 'from' email address as it's not the traditional abc@xyz.com

It's because of the html body text headers. Put the simple text with some tags like strong underline etc and try.

来源：https://stackoverflow.com/questions/16717257/phpmailer-mails-going-straight-to-spam

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