https://www.lawweb.in/2012/03/secure-email-certificates-do-you-need.html
Secure Email Certificates: Do You Need Them?
Email Security Using Digital Signature
Like any device or computer that requires a security setup, an email address or message is sometimes secured by individuals, organizations, or businesses. This leads to the question by businesses or individuals, if they need to use a secure email certificates.
An email client provides an option to send secure or encrypted email messages. It is why even web-based email providers are using SSL protocol (https) to secure the login information of the people. However, it does not mean the attachments or messages of the email are also secure, especially if the email account has been hacked.
Do you really need to secure messages using encryption and digital certificates? First, read the advantages and disadvantages of using email certificates, and then find out if you really need to secure by digitally signing or encrypting an email message.