As such if your post is going to include a spoiler, please include a spoiler warning. Spoiler warnings should be given to discussions concerning first-run episodes up to and including the 7th day after that particular episode has aired. Spoiler warnings should also be given for speculation concerning future episodes. Prefix your spoiler by putting at least 10 to 15 lines between the warning and the spoiler itself. Write your spoiler at the end of your message.
People can then skip the remainder of the message from the warning onwards.
I know it sounds obvious, but you'd be amazed how many people get this wrong. Keep the message short. Use the e-mail account you want messages to be sent to, and that you will post from. There are other forms of the listserv address which may currently work, but the ONLY one you should use is the one provided here. You will then receive a security confirmation.