title: Issue when sending SMTP Emails
body: <p>I am trying to send a mass mailing campaign using PHPList. I have everything working as I need but I am getting an error message from emails sent to Google. </p>
  
  <p>This error occurs in the header of the message:</p>
  
  <blockquote>
    <p>Received-SPF: permerror (google.com: permanent error in processing during lookup of bounce@planemover.com: exceeds recursive limit) client-ip=xxx.xx.xxx.xx;<br>
    Authentication-Results: mx.google.com;<br>
           spf=permerror (google.com: permanent error in processing during lookup of bounce@planemover.com: exceeds recursive limit) smtp.mailfrom=bounce@planemover.com  </p>
  </blockquote>
  
  <p>Does anyone know what would cause this error? Will this error cause my domain to be blacklisted?</p>