Even if you use SSL or TLS in your email, which is a pretty common setting these days, the email is only encrypted until it reaches the first mail server, then after that, it's sent as plain text! EncryptUs uses strong end to end encryption to guarantee safe passage of your confidential email messages.
Not only that, when you use EncryptUs you don't need to change anything about the way you send and receive email - it's all automatic.
Plus, EncryptUs is free to use.