Hi Steve,
The YAM WG discussed about the issues raised during the Sec-dir
review of draft-ietf-yam-rfc1652bis-03 [1] and concluded that:
(i) The presence of an option negotiation mechanism is not believed to
facilitate attacks or raise any security issues not already endemic
in electronic mail and present in fully conforming implementations
of RFC 5321.
(ii) Since MIME semantics are transport neutral the 8bitMIME option
provides no added capability to disseminate malware than is
provided by unextended 7bit SMTP.
Regards,
S. Moonesamy
1. http://www.ietf.org/mail-archive/web/yam/current/msg00366.html
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