--On Tuesday, August 16, 2011 19:38 -0700 Randall Gellens
But, as I hope is clear from the above, no such thing
happens. If the drop occurs after EOD, the mail (message)
transaction is over already, completed by EOD. If the drop
occurs before EOD, the mail transaction and the SMTP session
are abandoned and, because EOD wasn't received by the
server, nothing is delivered.
There is of course a timing hole (as there always is): if the
connection drops after the client sent EOF but before the
client received a reply, then the client can't know if the
server is processing the message or not.
Of course, this issue was news ... in 1988. See RFC 1047.