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I have the Mimemail module set up to send HTML mails out, after a form is filled in an email is sent to the user based on a custom template.

But the email should only be sent out if the user has previously filled in another form, if they haven't a message needs to be displayed and the email cancelled.

I'm simply using the following code to check that they have filled in the other form previously:

$query_result = db_query("SELECT MAX(sid) as max_id FROM webform_submitted_data WHERE data = '" . $email . "' AND nid = ###" )->fetchCol();

So if this returns an empty array then a message needs to be displayed and the email cancelled, but I can't seem to stop the email being sent, how do I do this?

1 Answer 1

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You can use hook_mail_alter() for that, e.g.

function MYMODULE_mail_alter(&$message) {
  if ($message['id'] == 'MYMODULE_foo' && any_other_condition()) {
    $message['send'] = FALSE;        
  }
}
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  • thank you! One problem, I still get a 'An error occurred and processing did not complete.' message how can I stop this from appearing?
    – user61334
    May 16, 2016 at 12:44

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