On Mon, Mar 4, 2013 at 1:00 PM, <[email protected]> wrote:
> --- On Mon, 3/4/13, Dale Moore <[email protected]> wrote:
>> ... I have had the philosophy that it is better to reject an email via
>> SMTP protocol (550 5.1.1 No Such user here) instead of accepting an
>> email then later sending a Delivery Status Notification (DSN) that an email
>> could not be delivered....
>
> I don't believe that one has such a choice. In today's hostile world, if one
> CAN reject during the SMTP session, one MUST reject during the session. An
> end system (where mail is delivered) should never generate a rejection DSN;
> only relay systems may/should do so but not always (cf. forged mail).
>
> The fact that your belief is not absolute is indicative of the problem.
But this isn't random spam here - the host in question is the
submission host and the client in question isn't a transport relay.
I agree that shouldn't really make a difference in terms of
understanding the protocol, but maybe google really wants android
users to use the gmail app.
--
Les Mikesell
[email protected]
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