Yes, DSC Can Be Used for Email Signing

• A Digital Signature Certificate can be used to sign email messages digitally.
  
• It verifies the identity of the sender and protects message integrity.
  
• It ensures that the email content is not altered after sending.
  
• Signed emails are legally valid under the Information Technology Act, 2000.
  
• It enhances trust and professionalism in digital communication.
  

Email Client Configuration Required

• The DSC must be installed or imported into the email client being used.
  
• Common email clients include Microsoft Outlook, Thunderbird, and Apple Mail.
  
• The certificate is linked to the email ID used for correspondence.
  
• Once configured, the option to digitally sign emails becomes available.
  
• Users may also encrypt messages using the same certificate.
  

Improved Security and Confidentiality

• Digital signing assures recipients that the email came from a verified source.
  
• It prevents phishing, spoofing, and tampering of sensitive messages.
  
• Encryption adds a layer of confidentiality to email content.
  
• Only the intended recipient with the correct key can decrypt the message.
  
• It supports secure communication in corporate and legal environments.
  

Requirements for Email Signing DSC

• The DSC must be issued with an email ID included in the certificate.
  
• Class 1 or Class 2 DSCs are typically used for email signing.
  
• The certificate must be valid, non-expired, and trusted by the system.
  
• Users must know the private key password for digital signing.
  
• Installation may require administrator rights on the device.
  

Verification by Email Recipients

• Recipients can see the digital signature icon or certificate details.
  
• Most email clients will verify the signature automatically.
  
• A valid signature appears as “signed” or “trusted” in the message.
  
• Any alteration to the email content will invalidate the signature.
  
• Recipients can verify the sender’s certificate and authenticity.