We're a group of hundreds of people, and few of us carefully read each message. Many of us also must pay for each email message we recieve, so it's a matter of courtesy to keep things manageable. If your message asks for information, your subject line should end with a question mark. Keep in mind that most people don't read email messages if they're more than a few screens in length. Break for paragraphs every 4 or 5 lines, even if it doesn't make sense rhetorically.
Short paragraphs are easier to read on computer screens than long ones.
And stay away from that caps lock key, people interpret all caps as shouting. It can be confusing when people refer to their favorite performers solely by their first names. And then he just burst into flames and was gone. In no case should the quoted material exceed the length of your reply. Quote only the bare essentials to make your posting clear.