rfc3974.txt:Motonori NAKAMURA:kyoto-u:japan:10:jan:2005:UNKNOWN:seccons:draft-motonori-dualstack-smtp-requirement:2004-08-25:2004-07-28:12:0:8:7:27:0:2004-2-6:0::2004-2-6:172:2005-01-31:161