Secure Sockets Layer (SSL), is a cryptographic protocol designed to provide communications security over a computer network. Several versions of the protocol are widely used in applications such as email, instant messaging, and voice over IP, but its use as the Security layer in HTTPS remains the most publicly visible.
The SSL protocol aims primarily to provide privacy and data integrity between two or more communicating computer applications. It runs in the application layer of the Internet and is itself composed of two layers: the SSL record and the SSL handshake protocols.
email migration is performed to consolidate multiple accounts into one, for example following an employee's departure.
Extended Validation (EV SSL)
Email migration is performed to back up or preserve data, for example, to ensure legal compliance.
Organization Validated (OV SSL)
email migration is performed for evaluation purposes, for example during a migration pilot.
Domain Validated (DV SSL).
Email migration is performed to facilitate an upgrade, for example when deploying a new version of an email system.