PHPMailer Authentication Problem Possibly Caused by ISPConfig 3 Configuration?

OS: Debian Squeeze, Dovecot
ISPConfig: v3.0.5.2

I am trying to use PHPMailer to connect to my mail server, and I keep getting the following authentication error:

Code:

SMTP -> ERROR: Password not accepted from server: 535 5.7.8 Error: authentication failed: UGFzc3dvcmQ6

Initially I thought this was cause because openssl was not enabled for PHP, but I checked php -i, and it is enabled.

I changed the password several times, and it still will not authenticate. Here's my code, and I have enabled smtpd:

Code:

$mail = new PHPMailer();
        $mail->SMTPDebug = 1;
        $mail->IsSMTP();
        $mail->Host = 'mail.server.tld';
        $mail->Port = 587;
        $mail->Username = '[email protected]';
        $mail->Password = 'zzzzzz';
        $mail->SMTPAuth = true;
        $mail->SMTPSecure = 'tls';
        $mail->FromName = 'Name';
        $mail->From = '[email protected]';
        $mail->Subject = $subject;
        $mail->IsHTML(false);
        $mail->Body = $mail_message;
        $mail->AddAddress($to);
        $mail->AddReplyTo($email);
        if (!$mail->Send()) {
            echo "Could not deliver message to: $to.<br/>";
        }

My mail clients use the same information as I placed in the configuration above, and have no problems connecting.

Is there something in ISPConfig 3 that might be preventing me from connecting to the mail server via PHPMailer?

 

Thank you for the prompt reply. It's a multi-server setup, so I need to be able to authenticate. I'll keep digging and post when I find a solution.

 

Yes.

Code:

smtps     inet  n       -       -       -       -       smtpd
  -o smtpd_tls_wrappermode=yes
  -o smtpd_sasl_auth_enable=yes
  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
#  -o milter_macro_daemon_name=ORIGINATING

I believe the problem is with my PHPMailer install. Thanks for checking on the smtps.

 

I tried a couple of different ways of adding my server IP to main.cf, and the only impact has been that email has stopped working.

Code:

mynetworks = 127.0.0.0/8 [::1]/128

I tried

Code:

mynetworks = 127.0.0.0/8 IP/CIDR [::1]/128

Code:

mynetworks = 127.0.0.0/8 [::1]/128 IP/CIDR

Neither worked, and I haven't been able to find good documentation to help me understand what is possible.

Can you please explain how to add the IP correctly?

 

Worked perfectly... Thank you!