REFERER check ...

That can be spoofed.

IP time checker...

How does that stop people from using the script?

Message substitutions ...

Ok, but don't you want to send out an e-mail to multiple people?

Perhaps what you want is to use SSL to connect to your script and insist that the script be run only via the secure port (443)?

Celebrate Intellectual Diversity

In reply to Re: Securing mailing scripts by InfiniteSilence
in thread Securing mailing scripts by sulfericacid

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