Within a custom module I am trying to send an email but it goes into the
spam folder when the email is to a gmail email address.
I am using drupal_mail[1] and then I implement hook_mail[2] to add the subject, headers and body to the message array. The header is a Content-Type of text/html (see below), but if I don't include the headers in the message array then it does not go in the spam folder but then I can't use any html tags within the email body.
John
[1] http://api.drupal.org/api/drupal/includes--mail.inc/function/drupal_mail/6 [2]
http://api.drupal.org/api/drupal/developer--hooks--core.php/function/hook_ma...
$headers = array( 'MIME-Version' => '1.0', 'Content-Type' => 'text/html; charset=iso-8859-1', 'Content-Transfer-Encoding' => '8Bit', 'X-Mailer' => 'Drupal', );