I will also send this to the mailman admins, as obviously this message will
be filtered by properly-acting servers. The mailman system is not handling
DKIM email properly. DKIM is an anti-mail forgery measure. Using DKIM, my
server attests that mail coming from me - directly - must be from my own
servers, or it should be rejected as below. Mailing list systems mus change
the headers to work properly with DKIM. There is information online on how
to get Mailman working properly with DKIM.
Bruce
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References: <1270b31f-505d-c8ca-9693-79740eaac3a7(a)leikhim.com>
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From: Bruce Perens <bruce(a)perens.com>
Date: Thu, 10 Dec 2020 21:26:13 -0800
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--
Bruce Perens - CEO at stealth startup. I'll tell you what it is eventually
:-)
The only issue I'm having is that I'm getting individual messages vs. a
digest. I logged into mailman and it looks like I'm still set to get the
digest, but there also appears to be no way to edit the options.
Dave, W4DSR (ex-WA6ILT)
An ARISS Slow Scan TV (SSTV) event is scheduledfrom the International Space Station (ISS) for late December. This will be a special SSTV event to celebratethe 20th anniversary of ARISS. The event is scheduled to begin on December24 and continue through December 31. Dates are subject to change due to ISSoperational adjustments.
I can understand why we haven't been using lithium cells up until now,
but with the advent of LiFePO4 batteries is it possible they may be
suitable for satellite use? Or is the charging cycle unsuitable since it
includes temperature monitoring? I know on-orbit is different, but a
large number of our local hams are now using these full-time to run
their stations, continuously charged by AC or solar panels. In fact, our
entire Field Day operation (should we ever get back into the field
again) is powered by a bank of these batteries; a 24v bus regulated down
to 14 volts at each radio.
David Reinhart, W4DSR
I think another lesson here is to consider failure modes and how to keep as
much as possible working when a component does eventually break. For
example, designing so that after the batteries die the satellite can still
work without them when in sunlight (like AO-7 eventually did). Or maybe a
way to switch uplink or downlink frequencies if one radio breaks (for
example if AO-95 could use L-band in lieu of UHF). Of course with a small
cubesat there's not a lot of room for redundant systems, but now that so
much is done in software it might be easier than in the past.
-Stephen
N8URE