Autoconfig config-v1.1.xml generator in PHP for Thunderbird mail client.

autoconfig.php

<?php
//get query data so we can extract the email address
$email = $_REQUEST['emailaddress'];
$domain = explode('@', $_REQUEST['emailaddress'])[1];

//set Content-Type
header("Content-Type: application/xml");
echo '<?xml version="1.0" encoding="utf-8" ?>'; ?>

<clientConfig version="1.1">
    <emailProvider id="<?php echo $domain; ?>">
    <domain><?php echo $domain; ?></domain>
    <displayName><?php echo $email; ?></displayName>
    <incomingServer type="imap">
        <hostname>mail.<?php echo $domain; ?></hostname>
        <port>993</port>
        <socketType>SSL</socketType>
        <username><?php echo $email; ?></username>
        <authentication>password-cleartext</authentication>
    </incomingServer>
    <outgoingServer type="smtp">
        <hostname>mail.<?php echo $domain; ?></hostname>
        <port>587</port>
        <socketType>STARTTLS</socketType>
        <username><?php echo $email; ?></username>
        <authentication>password-cleartext</authentication>
    </outgoingServer>
    </emailProvider>
</clientConfig>

htaccess.txt

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^.*$ - [NC,L]
RewriteRule ^.*$ autoconfig.php [NC,L]

sample-request.url

http://autoconfig.example.com/mail/config-v1.1.xml?emailaddress=user@domain.com

sample-response.xml

<?xml version="1.0" encoding="utf-8" ?>'; ?>
<clientConfig version="1.1">
    <emailProvider id="example.com">
    <domain>example.com</domain>
    <displayName>user@example.com</displayName>
    <incomingServer type="imap">
        <hostname>mail.example.com</hostname>
        <port>993</port>
        <socketType>SSL</socketType>
        <username>user@example.com</username>
        <authentication>password-cleartext</authentication>
    </incomingServer>
    <outgoingServer type="smtp">
        <hostname>smtp.example.com</hostname>
        <port>587</port>
        <socketType>STARTTLS</socketType>
        <username>user@example.com</username>
        <authentication>password-cleartext</authentication>
    </outgoingServer>
    </emailProvider>
</clientConfig>