well, phpmailer is really great. If the message are received in span, my guess is that you need to provide a valid or better smtp email server.
currently I'm using yahoo's smtp email server. It works fine. It is not necessary to use DH's smtp email server.
if you are sending email from your website, you can also use php mail function. To make sure the message do not go into junk box, write mail function like this
mail(To_Email_Address, message, subject, "X-Mailer: PHP/" . phpversion() . "\r\n Reply-To: From_Email_Address, "-f From: From_Email_Address);
I hope you are not confused.
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