United Airlines plans to offer two-way e-mail capability on all of its domestic flights by the end of the year. The service will cost $15.98 per flight, plus 10 cents per kilobyte for every data packet over 2 kilobytes (about 2 pages of typing). Kinda pricey, eh?

There have been several stories over the past few days about spam worth mentioning. First up is new spam-fighter Mailblocks’ failed attempt to stop others from using its claimed technology. As you may remember, Mailblocks uses the challenge-response method to differentiate between e-mail sent by humans and that sent by junk e-mailers. Turns out…

A new article from Wired discusses how today’s spam fighting programs act as medieval castle guards who bar entry at the gate. Several spam-fighting tools are discussed.

A few weeks ago I wrote on how spammers are hijacking your PC to send spam. But they don’t necessarily need to get into your computer to do it — they can spoof your e-mail address, forging not only your address but also your e-mail server.

How to avoid this? Follow a few simple…

Declan McCullagh writes that some of today’s new spam-blocking programs may actually wreak e-mail havoc. These programs use “challenge-response” technology, which requires human non-spammers to click a link or type a word in a box to make sure their e-mail gets to you. Apparently, much of this software is poorly designed, forcing individuals well-known…

Trend Micro’s eManager spam filter went berzerk last week, blocking all e-mails that contained the letter P.