Email Function

Hi,
I have the following function which im using to send emails from my website. It works fine however on some email accounts it wont come through. I know this will be to do with their spam / firewall settings but i was just wondering if there is any alterations that need to be done to this to make sure it stands the best chance of the email being sent to the reciptient.

Code (Text):

function email_users($to_email, $esubject, $to_name, $from_company, $from_email, $content){

            # -=-=-=-…

Email Function

See original post by adamjblakey