Gpg4win Email file encryption software Reviews
Gpg4win enables encryption and digital signatures to transport emails and files securely over the internet. Gpg4win is an installer for Windows and it is both free and open source.
Most of the servers have encryption enabled, but if you want to secure it even while it’s on your mail service’s computers or intranet then encryption software should be used.
Note: To check if your own mail service supports TLS encryption: open an e-mail and type in your address from your Gmail account and see if that red open padlock appears next to address.