I have a PHP function that sends HTML emails through the native PHP function or through UNIX sendmail. I need someone to make the headers more compliant to bypass spam filters. I think it is the reason Hotmail won't receive it. I also need the ability to send a file attachment - just the email sending, no form upload work needed.
I need a reference to check your work so I will know you aren't making something up ([login to view URL]). This is for a contact form on my LAMP website.
URL on request. Function attached.