Non-Internet email address

A "non-Internet email address" typically refers to an email address that does not use the standard email protocols associated with the Internet, such as SMTP (Simple Mail Transfer Protocol). Instead, these addresses may belong to private, internal networks or other systems that do not connect to the public Internet. Examples of non-Internet email systems include: 1. **Internal Corporate Email Systems**: Many organizations have their own email hosting services that are only accessible within their internal networks.