(computer science) a system of world-wide electronic communication in which a computer user can compose a message at one terminal that can be regenerated at the recipient's terminal when the recipient logs in
The breach, which took place last week but was announced over the weekend, compromised the e-mail addresses and some names belonging to the customers of many major U.S. companies that outsource their marketing and e-mail communications to Epsilon.
Look at the e-mail address--if it's purportedly from one of the companies above but ends in something other than .com, especially an international domain like .uk, that's a good indication it's a scam since most phishing attempts originate outside the U.S. Also be on the lookout for spelling errors in the e-mail address, URL, or body of the e-mail, or e-mails whose tone sounds particularly urgent.