res.cisco.comは安全ですか？

This is really a great site to use to send email in a secure manner. Never send email that has information which you consider confidential unless you use this protocol. It works great. You have to have a cooperative party on the other end of your email so it is best to alert that person that your most secret email will be sent in this Cisco format. Once both the sender and receiver are set-up by Cisco, your email will remain secure. Great idea. Don't do anything illegal on this site as a good subpoena will force Cisco to disclose all info. Excellent for any small or large business dealings.