America Online and Yahoo, two of the world’s largest providers of e-mail accounts, are about to start using a system that gives preferential treatment to messages from companies that pay from 1/4 of a cent to a penny each to have them delivered. The senders must promise to contact only people who have agreed to receive their messages, or risk being blocked entirely.
The Internet companies say that this will help them identify legitimate mail and cut down on junk e-mail, identity-theft scams and other scourges that plague users of their services. Thy (sic) also stand to earn millions of dollars a year from the system if it is widely adopted.
AOL and Yahoo will still accept e-mail from senders who have not paid, but the paid messages will be given special treatment. On AOL, for example, they will go straight to users’ main mailboxes, and will not have to pass the gantlet of spam filters that could divert them to a junk-mail folder or strip them of images and Web links. As is the case now, mail arriving from addresses that users have added to their AOL address books will not be treated as spam.
The short answer is "no", but it is a qualified "no" because there are odd ways of interpreting the question which could justify the answer "yes". Light is composed of photons so we could ask if the photon has mass. The answer is then definitely "no": The photon is a massless particle. According to theory it has energy and momentum but no mass and this is confirmed by experiment to within strict limits. Even before it was known that light is composed of photons it was known that light carries momentum and will exert a pressure on a surface. This is not evidence that it has mass since momentum can exist without mass. [ For details see the Physics FAQ article What is the mass of the photon? ]. Sometimes people like to say that the photon does have mass because a photon has energy E = hf where h is Planck's constant and f is the frequency of the photon. Energy, they say, is equivalent to mass according to Einstein's famous formula E = m...
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