Experts say it's a trade-off most users are willing to live with.
The war on spam is no different. Aggressive tactics to block unwanted commercial e-mail sometimes weed out legitimate items. In the name of fighting spam, Hotmail and some other e-mail services also restrict addresses to which their subscribers can send messages. And that increases the risk of inadvertently blocking the good mail with the bad. But some network administrators consider e-mail loss a necessary evil to prevent spam from overwhelming mail servers and clogging the Internet.