As soon as it is fixed in a tangible medium.
Photographers have many of the same rights as authors and other creative artists. Their work is considered proprietary and they hold the copyright to the work.
copyright
copyright
The work must be original, creative, and fixed in a tangible medium.
You couldn't, because it isn't your own original creative work. You could copyright a photo of your face, though.
Copyright protects the rights of the creator of a work.
An email is automatically covered by copyright from the moment it is created, at least to the extent it contains original and creative work. The text would be considered a "literary work" and non-text attachments may be covered as pictorial, graphic, audiovisual works or sound recordings.
Information itself is not subject to copyright. Only a creative work of authorship is protected by copyright.
A website is considered a "literary work" under copyright law.
You can't copyright a mere name. A name is not a work of creative authorship.
No, because it would be considered a useful work rather than a creative work, so it has the potential to be patentable. Ironically, a written description of the system, as well as charts or drawings explaining it, could be copyrighted.
Creative work is usually work that takes an inspiration. Fields of employment that are considered to be creative could be artist, a dancer, architect, and even acting.