NEW Header fields are lines beginning with a field name, followed by a colon (":"), followed by a field body, and terminated by CRLF. A field name MUST be composed of printable US-ASCII characters (i.e., characters that have values between 33 and 126, inclusive), except colon. In all cases, field names are interpreted as case-insensitive strings, so that, for example, "Subject", "SUBJECT", and "SuBjEcT" are considered to be the same field name.
Seems reasonable. While we're picking nits, RFC 3864 says you can't register a field with a dot in it, might be worth a mention.
Also, according to the spec, #)*%;' is a valid field name, although I observe that every name in the field name registries is LDH. Would it be worth a note saying that LDH names are likely to interoperate better?
Regards, John Levine, jo...@iecc.com, Primary Perpetrator of "The Internet for Dummies", Please consider the environment before reading this e-mail. https://jl.ly _______________________________________________ NOTE WELL: This list operates according to http://mipassoc.org/dkim/ietf-list-rules.html