S/MIME, known as Internet Engineering Task Force (IETF), is a standard used to deliver public-key encryption and digital signatures. This is now used in the latest email software services and was developed by RSA Data Security. S/MIME is similar to PGP in its functionality, but users need to obtain keys directly from a specific Certificate Authority (CA).

Numerous security remedies offer end-users more control over their email, with alternatives such as revoking accessibility, stopping email forwarding, stopping printing or copying/pasting emails, and the capacity to request signatures in encrypted attachments. The leading vendors will execute functions best for organizations that need safe invoicing and calls sent out through email.

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