Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto
2021-08-03 11:39:37
On Tue, Aug 03, 2021 at 08:25:11AM -0400, Sam Varshavchik wrote:
Some abuse of Delivered-To to trigger bounces has been reported now and
then, and the idea of obfuscated Delivered-To: had been discussed, but
has not yet been implemented. The freedom to do that some day remains.
I don't see anything intrinsically wrong with this, by itself. It's better
than nothing. But if the actual goal is to prevent proxy DDOSes, this should
be addressed directly: no bounce should be sent via SMTP for mail that was
accepted via SMTP.
Getting rid of all after-queue bounces is too drastic a step. It could
some day prove necessary, but I don't think it is warranted at this
time. A more conservative change (already possible, but not enabled by
default in Postfix) is to always include only the headers in bounces
(text/rfc822-headers):
https://datatracker.ietf.org/doc/html/rfc3462#section-2
That should have been the required format for bounces of EAI mail,
obviating the need for the message/global (transfer-encoding of
composite MIME parts) abomination.
--
Viktor
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- Re: [ietf-smtp] draft-crocker-email-deliveredto, (continued)
Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, John Levine
- Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, Viktor Dukhovni
- Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, John Levine
- Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, Viktor Dukhovni
- Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, Sam Varshavchik
- Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto,
Viktor Dukhovni <=
- Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, Sam Varshavchik
- Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, Michael Peddemors
Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, Dave Crocker
Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, Viktor Dukhovni
Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, John Levine
Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, Dave Crocker
Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, Viktor Dukhovni
Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, Dave Crocker
Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, Viktor Dukhovni
Re: [ietf-smtp] homework, not an experiment, draft-crocker-email-deliveredto, Dave Crocker
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