enreas on "[Plugin: WP Mail SMTP] stream_socket_enable_crypto(): SSL operation failed with code 1"

Just as Bruno said, but with a minor change:

$phpmailer->SMTPOptions = array(
	'ssl' => array(
		'verify_peer' => false,
		'verify_peer_name' => false,
		'allow_self_signed' => true
	)
);

That is, removing the closing curly bracket at the end.