Sendmail/php script enabled for specific sites

Hey guys,

Just wanted to ask, is it possible to enable sendmail for specific websites instead of the entire server as a whole. Reason is we disable sendmail since we provide wordpress hosting. It seems when using wordpress contact form with sendmail enabled, the contact form is manipulated to send spam.

In this case, we have an html site that we'd like to enable php scripts for, which is for their contact form. How can we possibly enable the php contact form script to work on this...

Sendmail/php script enabled for specific sites