Warn on empty/blank subject line/header? (I've got a lead)

Question

I see that others have already asked here a few times about whether there is a plugin or setting for Mail.app to warn me when I attempt to send a message w/ no subject header. The answer seems to be there's no way to do that and we're just out of luck. You'd think there'd be a demand for this, as it seems to be a mistake that anyone can make every now and then.
Well, I'm asking again, and also I've got a lead on a potential route to a solution.
I did find a handy Mail plugin that warns when you're forgetting an attachment:
http://www.macosxhints.com/article.php?story=20060330105237123&query=mail%2Batta chment
The author of that plugin even has a tutorial on making Mail.app plugins:
http://www.bazza.com/~eaganj/weblog/2006/03/29/demystifying-mail-app-plugins
For someone with the right know-how, it seems like this could totally be adapted to warn on an empty subject line! Come on, somebody out there's gotta be up to the task! It's your channe to win the adoration of millions and prevent ambiguous emails worldwide!
G5 dual 2.3ghz   Mac OS X (10.4.2)  

Answer 1

I take the simple (though not free) way:
www.bebosoft.com/formstogo/
domerdel wrote:
> i've developed a working PHP5 file to submit the form to
the
> webmaster (info@). Now, the client wants me to add on a
custom
> autoResponder. basically, the user fills out the form,
the user gets
> an e-mail saying thank you in the subject line and body
copy, says it
> came from info@ website.
>
> Here's the PHP script that's linked to it:
>
>
>
> <?
> error_reporting(1);
> if ( $_POST['tpl'] == "mail_req.tpl" )
> $mailto = Array("[email protected]");
> else
> $mailto = Array("[email protected]","[email protected]");
>
> $subject="Celibre Web Inquiry: {$_POST['name']}";
>
> if ( $_POST['tpl'] == "mail_req.tpl" ) {
> $t_data=file_get_contents("mail_req.tpl");
> $subject="Req Cert Inquiry from Website";
> }
> elseif ( $_POST['tpl'] )
> $t_data=file_get_contents("mail_contact.tpl");
> else
> $t_data = file_get_contents("mail_template.tpl");
> foreach($_POST as $key=>$value)
> $t_data=str_replace("[".$key."]",$value,$t_data);
>
> if ( $_POST['companyname'] )
> $fromname=$_POST['companyname'];
> elseif ( $_POST['name'] )
> $fromname = $_POST['name'];
> else
> $fromname = $_POST['firstName'] . " " .
$_POST['lastName'];
>
> $headers = "MIME-Version: 1.0\n".
> "Content-type: text/html; charset=iso-8859-1\n".
> "From: \"Website.com\" <[email protected]>\n".
> "Date: ".date("r")."\n";
>
> foreach($mailto as $value) {
>
mail($value,$subject,$t_data,str_replace("[to]",$value,$headers));
> }
>
> header("location: thank_you.html");