ietf-dkim
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Re: [ietf-dkim] x= lets senders expire responsibility

2006-04-13 11:33:17
----- Original Message -----
From: "Douglas Otis" <dotis(_at_)mail-abuse(_dot_)org>

But for the time-shifted application, if the message reception time
(Received: header) is used, then it shouldn't matter.

When verification occurs at the MUA, the key must remain available
_beyond_ the SMTP transport period.

Agreed.

Of course, the further away you are from real time, the higher the potential
for failure.  This is par for the course with time-shifted applications for
DKIM.

Unless it has help from the backend server, offline mail systems will not
work very reliably when keys are being changed.

The only way I see to reduced this is to increase the frequency of your
pickup times so that is closer to real time.  At pickup, the DKIM plug-ins
do their work.  So even if you are away on vacation, your computer is still
on and doing its mail pickup.

But the more you shift/delay your verification time, the more you get away
from the real time dynamics of the system and you have more potential
failure.

--
Hector Santos, Santronics Software, Inc.
http://www.santronics.com





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