A header field is a name-value pair separated by a colon (:) as in name:value. A value can have one or more header field parameters separated by commas. Each header field parameter also consists of a name and value separated by an equal sign (=) as in param=pValue. Header field parameters are separated from another header by semi-colons. Header fields are separated by newlines.
Windows XP Professional with Service Pack 2 (SP2), Windows Server 2000 with Service Pack 4, Windows Server 2003, Windows Vista Ultimate Edition, Windows Vista Business Edition, Windows Vista Enterprise Edition