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PHP

Block All Outgoing Email on Staging Sites

Stops WordPress from sending any email on development, local and staging environments, so test orders and imports never reach real people.

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Code

add_filter( 'pre_wp_mail', function ( $return ) {
    if ( 'production' !== wp_get_environment_type() ) {
        return false;
    }

    return $return;
} );

Notes

Set WP_ENVIRONMENT_TYPE in wp-config.php. Emails are silently dropped and wp_mail() returns false.

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  3. It is added inactive: review the code and settings, then switch it on.

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