Re: Lost mail with EXPIRE 0 (was Re: [Off Topic] Need review for POP3 extension mechanism)

Alexey wrote:
>> EXPIRE 0 means the server MAY delete messages immediately after QUIT.
>> In actual practice, I would expect message expiration to happen later
>> in most cases, such as overnight.  The QUIT issue is really no-win.  If
>> we say that servers can't delete unless the client sends a QUIT,
>> clients will simply not send QUIT (many don't anyway).  And why should
>> EXPIRE 0 be different from EXPIRE 1 or EXPIRE 30?
>
>Here I see a problem.
>If server will clear mailbox unconditionally when EXPIRE value is zero
(i.e.
>server will delete even unseen message) it must not advertise EXPIRE 0.
>Let's see what may happen otherwise. Client connects to server using
dial-up
>TCP/IP connection. Client opens mailbox, starts to download mail, but
unexpectedly
>ISP hangs up modem connection.
>Server discovers that connection is lost and deletes mail.
*** I assumed that if the setting was EXPIRE 0, then the server would only
delete the mail after a message was succesfully downloaded with a RETR.
Assuming that this was Randy's intent, then this could be easily addressed
with another line of text in the document.  This is a good case that Alexey
brings up, and think it should be mentioned in the draft.