draft-ietf-drums-smtpupd-06.txt

draft-ietf-drums-smtpupd-06.txt, Appendix I reads:

% (1) TURN
%  
% This command, described in RFC 821, raises important security issues
% (described in RFC 1123).  Its use is deprecated; SMTP systems SHOULD
% NOT use it unless the server can authenticate the client.

I couldn't find the reference to TURN in RFC1123.

-Dan Wing