Recently I've received two suspicious messages reporting to be from PayPal. They claimed that my account had been "limited" due to incomplete profile data that I needed to update, links provided. Neither message personally identified me, as PayPal communications are supposed to. When I checked the message details, the sender was "from stagsv05 ([192.168.2.18]) by mailout.studerus.ch".
I reported both messages to "spoof@paypal.com". I didn't follow the links. Haven't heard anything back from PayPal, but I would advise to be on the lookout for any similar messages you receive, and to be cautious not to respond or follow their links provided.