| |
CX2SA > SATDIG 01.11.13 21:03l 351 Lines 10931 Bytes #999 (0) @ WW
BID : AMSATBB8369
Read: GUEST
Subj: AMSAT-BB-digest V8 369
Path: IZ3LSV<ED1ZAC<CX2SA
Sent: 131101/1902Z @:CX2SA.SAL.URY.SA #:110 [Salto] FBB7.00e $:AMSATBB8369
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. remailer (Jim Sanford)
2. Re: SPAM and AMSAT.org (Clint Bradford)
3. Re: Spam (MICHAEL)
4. Re: Spam (Gregg Wonderly)
5. Re: Spam through amsat.org (Greg D)
6. Re: remailer (Greg D)
7. FUNcube Slide Presentation (David A B Johnson)
----------------------------------------------------------------------
Message: 1
Date: Thu, 31 Oct 2013 15:16:05 -0400
From: Jim Sanford <wb4gcs@xxxxxx.xxx>
To: "'Amsat - BBs'" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] remailer
Message-ID: <5272AC75.2060704@xxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
All:
Anything up with the remailer? Just got a bounce on 2 emails I sent to
somebody @xxxxx.xxxx
host inbound.ucsd.edu[132.239.0.180]:
550 #5.7.1 Your access to submit messages to this e-mail system has been
rejected.
Thanks & 73,
Jim
wb4gcs@xxxxx.xxx
---
This email is free from viruses and malware because avast! Antivirus
protection is active.
http://www.avast.com
------------------------------
Message: 2
Date: Thu, 31 Oct 2013 13:35:09 -0700 (GMT-07:00)
From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: SPAM and AMSAT.org
Message-ID:
<31269791.1383251709095.JavaMail.root@xxxxxxxxxxxxxxx.xxx.xx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
I have been involved with the 'Net as long as anyone else here, and
have had AMSAT.org email forwarded for a few years. I cannot identify
a single piece of spam as having originated from/through amsat.org.
Usually in the minority,
Clint K6LCS
----------------------------------
Clint Bradford, K6LCS
http://www.clintbradford.com
------------------------------
Message: 3
Date: Thu, 31 Oct 2013 18:20:55 -0400
From: MICHAEL <mikef1234@xxxx.xxx>
To: <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] Re: Spam
Message-ID: <BLU0-SMTP16254A52E49751AE157A4EDCB0B0@xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
I have been subscribing to this for over three years and have never received
any spam from the AMSAT-BB. Had it happened I would not be subscribing to
it!
Respectfully,
Michael /N8GBU
------------------------------
Message: 4
Date: Thu, 31 Oct 2013 17:34:24 -0500
From: Gregg Wonderly <w5ggw@xxx.xxx>
To: MICHAEL <mikef1234@xxxx.xxx>, AMSAT-BB@xxxxx.xxx
Subject: [amsat-bb] Re: Spam
Message-ID: <5272DAF0.4050409@xxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Email is the most insecure way of transferring information, and the exploits
are
easy, because the "details" are always hidden from you. Use the functions in
your email program to show all the headers.
In the case of MICHAEL's email, it has a header line:
Received-From: from michaelPC ([72.240.150.93]) by BLU0-SMTP162.phx.gbl over
TLS
secured channel with Microsoft SMTPSVC(6.0.3790.4675); Thu, 31 Oct 2013
15:20:58
-0700
which tells you where the SMTP client connected from. This is the ultimate
source information, for all non-exploited or non-compromised email servers.
There will be one of these lines for every server that touched the email.
People can "craft" an email that looks like it came from someone who did not
send it. If you don't look at these header lines, you'll only have the
visible
'From' and 'To' information that your email client shows you, which can be
easily forged since it is just text that your email client crafts and sends to
the server.
Legitimate ISPs don't accept email with a 'From' address that is not,
precisely
the 'id' of the user connecting and authenticating to the SMTP server.
So, it can be possible for you to receive an email that appears to be from
this
list, but which is actually, completely NOT from this list, but SPAM crafted
by
a SPAM bot, and sent to you, because your email address was somehow revealed
to it.
Gregg Wonderly
W5GGW
On 10/31/2013 5:20 PM, MICHAEL wrote:
> I have been subscribing to this for over three years and have never received
> any spam from the AMSAT-BB. Had it happened I would not be subscribing to
> it!
>
>
>
> Respectfully,
>
>
>
> Michael /N8GBU
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 5
Date: Thu, 31 Oct 2013 20:05:54 -0700
From: Greg D <ko6th.greg@xxxxx.xxx>
To: Phil Karn <karn@xxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Spam through amsat.org
Message-ID: <52731A92.1060601@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Phil,
Interesting idea. I think what you are suggesting is to turn the Amsat
email forwarding service into an email lookup / reply service, where the
sender of the original message would receive a means for contacting you
(your contact email address) in a non-machine readable form. The
original message would be discarded. They would then contact you via a
second message, to that (human readable) address. Spam would be
eliminated, and the legitimate people wanting to contact you would be
enabled to do so directly.
A few thoughts...
1. As has been noted by others, most folks aren't getting a lot of spam
(I've received a couple over the past many years, but not nearly enough
to be a problem), so the service as it stands seems to be working. If I
recall correctly, there was a problem a few years ago, and that was
corrected by switching providers or something like that. The folks
maintaining the reflector seem to be on top of things.
2. The current service does hide your real email address from the
as-yet unknown-to-you sender; your response to them can be from any
email address you choose, or not at all, depending on your mood at the
time. An automatic reply would disclose your address to someone unknown
to you without your knowledge. Though the address could certainly be an
address you specifically set up for this purpose, and the auto-responder
could notify you of the attempt, the horse would have already left the
barn. So, it is a bit of a security concern.
3. Machine-based Captcha response engines are reported to be getting
pretty good, and in theory could be modified to bypass your gateway.
It's probably not worth it, at least right now, but if your concept were
deployed widely, and on sites with higher potential payback, the
spammers attention might be directed to do the required engineering.
Still, interesting.
Greg KO6TH
Phil Karn wrote:
> A significant fraction of the spam I get on my primary email account
> comes by way of the amsat.org email reflector; by my count, 18 of the 76
> spam emails I've received in the last day.
>
> But I don't want to just shut it off; sometimes people I do want to hear
> from make contact that way. And I've used it to contact others whose
> email addresses I don't know, but who I know to be AMSAT members.
>
> I wonder if it would be possible to set up some sort of auto-responder
> on amsat.org so that instead of just forwarding email, returns a message
> to the sender with a non-machine-readable image of the user's actual
> email address, possibly accompanied with a sound file with the same
> information for anyone with impaired vision. Spammers couldn't handle
> it, especially since most don't even use valid return addresses. But any
> real human could resend his email directly to its destination.
>
> What do people think of this idea? How much of a problem is spam for
> everyone else here?
>
> Phil
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Thu, 31 Oct 2013 20:20:57 -0700
From: Greg D <ko6th.greg@xxxxx.xxx>
To: wb4gcs@xxxxx.xxx
Cc: 'Amsat - BBs' <amsat-bb@xxxxx.xxx>, Jim Sanford
<wb4gcs@xxxxxx.xxx>
Subject: [amsat-bb] Re: remailer
Message-ID: <52731E19.2070900@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Jim,
A "550" response is usually because the remailer's spam filter (or more
specifically, the service the remailer contracts with to provide that
filtering function) thinks your email is coming from a source known to
be a provider of spam. My experience with these filters is that they
are incredibly crude, often rejecting all email from a particular
provider, legitimate or otherwise. Yes, they block spam, but there's a
lot of non-spam that gets swept up with it too. Not their concern,
apparently, as they did block the spam...
Often these lists get corrected without (additional) intervention,
either because of the outcry from others, or an alert staff. If not,
you will need to contact your provider and let them know that you are
being blocked. They will need the email header information, where the
specific spam filter contact information is usually located. I've not
had much luck getting things cleared up with the filtering service on my
own.
Good luck,
Greg KOO6TH
Jim Sanford wrote:
> All:
> Anything up with the remailer? Just got a bounce on 2 emails I sent
> to somebody @xxxxx.xxxx
>
> host inbound.ucsd.edu[132.239.0.180]:
> 550 #5.7.1 Your access to submit messages to this e-mail system has
> been rejected.
>
>
> Thanks & 73,
> Jim
> wb4gcs@xxxxx.xxx
>
>
>
>
> ---
> This email is free from viruses and malware because avast! Antivirus
> protection is active.
> http://www.avast.com
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 7
Date: Fri, 01 Nov 2013 12:53:01 +0000
From: David A B Johnson <dave@xxxxx.xx.xx>
To: Amsat - BBs <amsat-bb@xxxxx.xxx>, EU_AMSAT@xxxxxxxxxxx.xx.xx
Subject: [amsat-bb] FUNcube Slide Presentation
Message-ID: <5273A42D.5010105@xxxxx.xx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi,
I made a presentation on FUNcube at the RSGB Convention a couple of weeks
ago and several people have asked for a set.
Instead of emailing them out, we have put the on the FUNcube web site in
the
working documents page:
http://funcube.org.uk/working-documents/
73
- Dave, G4DPZ
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 8, Issue 369
****************************************
Read previous mail | Read next mail
| |
