Which delivery model is an example of a cloud computing environment that provides users with a web based email service ?

Cloud computing, also known as cloud services, cloud concepts or simply the cloud, is a paradigm that allows to offer computer services. through a network, which is usually the Internet.

(data persistence, authentication, messaging, etc.). for example, a Linux system, a web server, and a programming environment such as Perl or Ruby).

Commercial examples are Google App ,Microsoft Azure,

yes you can contact there email