By Beth Cohen

February 24, 2005

Have you ever sent e-mail to your clients and suddenly received bounce-backs with error messages saying your mail server is invalid or on a spam blacklist? Or how about this scenario:

You have a DSL or cable modem Internet connection, which has been working perfectly for years. Suddenly, the connection starts randomly cutting off several times a day. Rebooting the router reestablishes the link. Your network administrator says everything is working internally, but your staff is annoyed with the continual disruption