The problem is persisting. I received 3 payments today and no payment notification emails. I think I found the problem... it looks like all of PayPal's outgoing email servers are blacklisted. I checked the sender's IP on a received payment notification and it was 173.0.84.226. Then I checked that IP here, http://www.senderbase.org/lookup/?search_string=173.0.84.226, and here, http://mxtoolbox.com/SuperTool.aspx?action=blacklist%3a173.0.84.226&run=toolpage# . The CISCO senderbase page will show you the other IPs used by PayPal for email... they are all blacklisted. If anyone gets on the phone w/ PayPal, please relay this info to them.
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