At 03:33 PM 6/30/98 +0200, Werner Koch wrote:
4.2.3. Packet Length Examples
they literal, compressed, or encrypted. The first partial length
MUST be at least 512 octets long. Partial Body Lengths MAY NOT be
used for any other packet types.
I did not found MAY NOT in rfc2119 and I guess is should be replaced
by SHOULD NOT.
That looks like it was meant to be a MUST NOT, not a SHOULD NOT. That is,
under no other circumstances can you use partial body lengths.
--Paul Hoffman, Director
--Internet Mail Consortium