A digital mailing system is called

A digital mailing system is commonly referred to as:

1. Email: Electronic mail, a system for sending and receiving messages electronically.
2. Electronic Mailing System (EMS): A system that allows users to send and receive electronic messages, often with attachments and formatting options.
3. Digital Mailbox: A virtual mailbox that allows users to send, receive, and manage electronic messages.
4. Online Mailing System: A system that enables users to send and receive electronic messages over the internet.
5. Digital Post Office (DPO): A system that allows users to send and receive electronic messages, often with features like tracking and delivery confirmation.
6. Electronic Post Office (EPO): A system that enables users to send and receive electronic messages, often with features like tracking and delivery confirmation.
7. Digital Mail Server: A server that manages and stores electronic messages, allowing users to send and receive them.
8. Email Server: A server that manages and stores electronic messages, allowing users to send and receive them.

These terms are often used interchangeably, but some may have slightly different connotations or features.