Check your formatting Many mailers can't accept 8-bit characters. Likewise some email clients like MS-Outlook sometimes attach files to the messages. Please make sure your mail reader is configured properly. Make sure that you are wrapping your text within 75 characters otherwise it can be difficult for others to read in their mailer. Please use paragraphs, capitalizations, and other formatting to make your posts easier to read.
Some people quote most of the message they are replying to.
This is poor style. In general you should only quote as much as is needed for someone reading your post to be able to follow the conversation. If you are quoting more than you are responding to you probably ought to go back and delete some text. If you are making point with references many may not be able to easily access, please post enough so that they can follow your reasoning. Quoting from articles or books, so long as they aren't too extensive, is fine and falls within the fair use act of copyright law.