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Article View: demon.announce
Article #182

New email facility

#182
From: Malcolm S. Muir
Date: Thu, 09 Sep 2004 07:45
71 lines
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In response to customer requests, we have launched a new email
facility, for those customers that collect email via POP3 or SMTP
from the punt class servers.

This facility, when enabled, will cause Delivery Service
Notification (DSN) messages (commonly called 'bounce' messages) to
be silently discarded at the server.

Such messages are normally received when a message you send fails
to reach its destination. However, some spam is sent with false
addresses (perhaps so as to avoid filters or to induce the
recipient to read it) and, if this spam cannot be delivered, the
resulting DSNs will be sent to you and not the spammer.

Please note the following cautions if you choose to enable this
facility on your account:

   This option will discard any message with a null SMTP envelope
   reverse-path, unless it is a Message Disposition Notification
   (MDN, RFC2298).  The only messages with null reverse-paths should
   be disposition or delivery notifications. Certain mail-systems
   have been known to use a null reverse-path for mails from
   mailing-lists; customers subscribed to mailing-lists should
   take especial care to verify that this does not apply to them
   before enabling this option.

   Unfortunately, in the real world there is no guaranteed way to
   determine if a message is a bounce. It is therefore possible
   other messages may be discarded in error and some 'bounces'
   from remote sites may be sent with a non-null reverse-paths and
   hence will be allowed through in error.

   **ALL** DSNs will be discarded, including those that result
   from "real" email that is actually sent from your account and
   which is mis-addressed or rejected in error by the remote site.

We therefore strongly recommend that this option should only be
considered if you are receiving an unmanageable number of DSNs as a
result of such an attack, since it will discard all DSNs, legitimate
or otherwise. We would also recommend that it is only enabled for
short periods, then disabled to check if the unwanted activity has
ended, enabling it again if necessary.

This new option has been initially configured as 'disabled' for all
customers, except those for whom previous arrangements have
been made. To enable the option please visit the Web Password page

   http://www.demon.net/webpassword/

and follow the instructions there.

Malcolm Muir
D e m o n

- -- 
Malcolm S. Muir                                   D e m o n
Sunderland                                        322 Regents Park Road
England                                           London N3 2QQ


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From: "Malcolm S. Muir" <Malcolm@demon.net>
Newsgroups: demon.announce
Subject: New email facility
Followup-To: demon.service
Date: Thu, 9 Sep 2004 08:45:19 +0100
Organization: Demon Internet Ltd.
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Approved: malcolm@demon.net
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