Drupal SMTP Authentication with PEAR::Mail

If you want to use smtp authentication with Drupal you can use PEAR::Mail with drupal_mail_wrapper.

1. Install PEAR::Mail. On linux you can just run the following command as root:
   

    pear install --alldeps Mail

   
   


2. Create a new file, say includes/smtpmail/smtpmail.inc and paste the following code into it:
   

   
   <?php
   require_once 'Mail.php';
   require_once 'PEAR.php';
   
   function drupal_mail_wrapper($mailkey, $to, $subject, $body, $from, $headers) {
     global $smtpmail;
   
     $headers['From']    = $from;
     if ( empty($headers['To'])) {
       $headers['To'] = $to;
     }
     $headers['Subject'] = $subject;
   
     $recipients = $to;
     $mail_object =&Mail::factory('smtp', $smtpmail);
     $output = $mail_object->send($recipients, $headers, $body);
     return $output;
   }
   

   
   


3. Edit your settings.php and add the following at the end:
   

   
   $conf = array(
     'smtp_library' => 'includes/smtpmail/smtpmail.inc'
   );
   global $smtpmail;
   $smtpmail= array();
   $smtpmail["host"]  = 'your.mail.host';
   $smtpmail["auth"] = TRUE;
   $smtpmail["username"] = 'your_user_name';
   $smtpmail["password"] = 'your_password';
   

   
   

From now on every call to drupal_mail will go through your drupal_mail_wrapper and will be sent using PEAR::Mail with SMPT authentication.

I'm sure some more serious drupaler would have made this a nice module, with configuration screens and the lot, but I'm too lazy today.