PayPal and eBay have long drawn the attention of criminal phishers who try to spoof the companies and steal login information from their customers.
If that customer happens to be a user of Google's web-based Gmail service, those phishing messages should drop dramatically in their occurrences.

Google announced another Gmail security feature addition on the Gmail blog, coming not long after their announcement of a remote control for Gmail that will let users turn off any concurrent sessions in progress. The newest feature concerns incoming mail labeled as being from a PayPal or eBay address.

Through the adoption of Domain Keys and DKIM by eBay and PayPal for their outbound messages, Gmail (and presumably any other email server that checks for DKIM) will be able to identify legitimate communications from those two senders.
more.. link to news article

So for you uber-techies -- what's dif about this than what Gmail has been doing for years already ??

Gmail has yet to let a E/PP phish into my 'inbox". They always go to my junk box. They have yet to goof and mix up anything, as far as E/PP, anyway.

They do miss a few "junk" emails, but very few.

Carol