On 2009-09-09, at 6:19 AM, Arnt Gulbrandsen wrote:
1. I strongly suspect that there are clients that require text to be there. When the INN NNTP server appeared and sent a single ASCII space as text, a good few NNTP clients were surprised. I doubt IMAP client authors are more careful.
It's allowed by the ABNF and this whole topic was covered a few years ago.
ck