Sending confirmation mail via Advanced (dynamic)

Hi Bob,
​
I'm puzzled... Trying to get a previes form working (V5), but it seems it does not send out the confirmation messages any more..
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In the designer I have Fieldname "email" and Field ID "email" (and this is captured in the DB!!)
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In the set-up, in the On-Submit area I have a Custom code with the following in it
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<?php
$form->data['subject'] = 'Betreft uw inschrijving P&P Bussloo dd '.$form->data['datum'];
?>
​
In the email area advanced tab I have :
Dynamic to : email
Dynamic subject: subject
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However it does not send out an email anymore
​
Pls advise

You never would belief...
In the FROM part I have put in : noreply@ziggo.nl (Ziggo is my provider)
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Now it's clear Ziggo blocks this noreply@ziggo.nl..................
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Have changed it to my hostingadress, like ...noreply@mywebsite.nl
​
SOLVED !!!!