EMAIL ENCRYPTION IS HERE

I have started using an email encryption program, Citrix ShareFile.  I decided to give it a try in light of all the talk lately about secure communications.  I’m told it is already widely used.
ShareFile is easy to use.  If I send you an email that says I have sent you an encrypted message and has a green button labeled “view encrypted message,” all you have to do is click on that button, then type in your name and email address and click “continue.”  A window containing the email message will open.  
Don’t worry, nothing is going to be done with your name and email address.  All that happens is the ShareFile program validates that the email address you enter is the same as the email address in the “to” line on the email that I sent.  
If I am sending you an email with a file attached, the file is also encrypted, and the process for receiving the file is essentially the same.  
The email message, and any attached files, are sent with what ShareFile describes as AES 256-bit encryption.  That means the information is being sent with enhanced security, and without the typical restrictions on file size for email attachments. 
I would appreciate receiving comments on your experience with ShareFile, and your feedback on the topic of encrypted communications generally.