This is NOT considered polite in personal correspondence but is okay in business communications. For the office, you may not want to include the whole text of the received message, but just enough to clarify the issues. One small shout for emphasis is okay. You write this yourself. You can put in anything you want, but be sure it would be appropriate for all addressees.
Signatures are helpful.
You may identify yourself and provide means of contacting you, eg, phone, fax, pager, webpage, etc. Don't expect others to be as nice as you are. Be patient with them. They have their own agenda and problems and may not be ready to reply as rapidly or completely as you may want. Some are obvious and some stretch the imagination.