On Tue, Jun 06, 2006 at 06:50:23AM -0400, Jeff Pang wrote: > When I read RFC2821,I saw that it permit multi-MAIL FROM commands appear in the same mail transaction. > For example: > > HELO abcd.163.com > MAIL FROM:<abc at 163.com> > MAIL FROM:<def at 163.com> > .... Where does it say this?