PHP Mail Headers

[Jameson]

Hi Everyone:

I'm having a small problem with a mail script I wrote in PHP. I'm
running PHP5 and Apache on Mac OS X Tiger. I have all of the headers
defined for the script that send an email through PHP. The problem that
keeps happening is that the server's hostname and domain name is added
to the "from name", so when someone gets the email, it looks like it's
coming from "Firs...@hostname.domainname
Last...@hostname.domainname" instead of "Firstname Lastname
<email@emailaddresshere>". Has anyone run into this before? Is there an
additional header I can specify for the sender's full name?

Thanks in advance for the help!