This is not a hard and fast set of rules. This is an in general, how to get your point across on mailing lists. Most of these are as David Parter said:
[use common sense] make your posting easy for readers to read, and easy to follow the points your are trying to make. quote where and how it helps readers to understand.
Some other documents published on the subject, and considered by some to be authoritative: http://nanog.org/listfaq.html#conventions http://www.dtcc.edu/cs/rfc1855.html http://www.humbug.org.au/netiquette.php