We host a client's website that's configured to use external DNS and external email, basically we are just hosting the website.
We're experiencing a problem sending email with drupal's webform module.
When the form is set up to go to anyone at the client's domain, the server must be acting as the primary mail exchange, instead of redirecting to the client's external mail. But when I set the form to go to my gmail account or my work account, the form submission arrives just fine.
The site is hosted on our Linux server with WHM. Their email is hosted on IIS.
Thanks in advance.