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<?php

function my_et_contact_page_headers( $headers, $contact_name, $contact_email ) {
	
	/* ==================================================================
	 * >>>> Replace the "your-domain" below with your actual domain. <<<< 
	 * ==================================================================
	 */ $from = 'noreply@your-domain.com';
	 
	 $headers[0] = "From: \"{$contact_name}\" <{$from}>";
	 
	 return $headers;
}
add_filter( 'et_contact_page_headers', 'my_et_contact_page_headers' );