Many email clients now support HTML, however there are still many do not. Be sure to switch back to Western Alphabet before sending a message of your own. In general, it is considered polite to post in Plain Text mode only. If you do post in HTML, please be sure to differentiate your reply from the original message with more than just color as those with text-only email clients will not be able to follow who wrote what. Most people know what spam is and know not to post it to the mailing lists.
Flames are basicly extremly insulting posts.
Flame wars on the mailing lists will cause the list to be put under moderation and all posts to be approved first. Lurking If you are new to these mailing lists, it would be a good idea to download a monthly archive or a few digests and read through them. Don't be in a hurry to post your own messages, it is quite possible that the issue has recently been discussed.