Is white space allowed betwee mime header field-name and ':' separator

Question

Within a mime header, is white space allowed between the header field-name and \':\' separator? For example, are:

Content-Type: 

Answer 1

If the question is about the HTTP then the answer is "no, not allowed". See http://greenbytes.de/tech/webdav/draft-ietf-httpbis-p1-messaging-21.html#rfc.section.3.2