InvisiMail Lite is the free entry-level version from the InvisiMail family of email encryption programmes. It works with your existing e-mail client to automatically encrypt and decrypt your e-mail with strong encryption. The entire process is transparent and performed in the background. You do not need to know anything about encryption to use InvisiMail. Also, InvisiMail compresses all messages and attachments adding another level of security and saving time.