Problems with E-Mail Filter

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Hello out there,
i have a Problem with an User-based E-Mail Filter i build. It will not work, but i don't know why. Could someone help me plz?

Problem is the following:
I have an E-Mail Account where E-Mails should arrive in the Inbox and which gives out an autoreply. It doesn't matter from where the E-Mail comes.
So i chose 2 different options.
- When "From" contains a "@" reject E-Mail with Message "Foobar"
OR
- When "To" is "mailaccount" reject E-Mail with Message "Foobar"

None of them works. The Script File is written to the Mailserver (localhost) and looks like this:

require "fileinto";
require "reject";
require "regex";
require "vacation";
require "vacation-period";

if anyof (
header :contains ["From"] [ "@"]
)
{
reject "Here is my Reply Message";
}

keep;

stop;

So now i don't know what i can do to claim my goal with this Autoreply Message.
The Server is an 5643 (hymalia) .
Thx in Advance
Greetz,
Jürgen

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no one can help me?