How to disable "Contact a Board Administrator"?

Question

The page /forum/memberlist.php?mode=contactadmin leads to this page that allows a guest to spam.

How to completely disable this "Contact a Board Administrator" feature in phpBB 3?

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Sample spam message:

Hello Administrator,

The following is an e-mail sent to you through the administration contact page on "xxx".

The message was sent from a guest who specified the following contact information: Name: Barnypok E-mail address: [email protected] IP Address: 188.143.x.x

Message sent to you follows
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zd9hNf Link deleted.

Answer 1

The solution is to go to ACP (Admin control panel) > Contact page settings > Enable contact page > Disabled.