[NCUC-EC] List problems

[Tapani Tarvainen]

[Note Cc: e-team, followups about technical stuff there please]

Dear Grace, Zuan, all,

I took a look at server logs. The issue is indeed related to hotmail,
which was rejecting messages from NCUC's server as spam.

Tentative analysis suggests someone in the same network segment
as our server has been spamming and hotmail has decided to block
the entire segment. :-(

Alternatively they may have decided ncuc's mail is spam and blocked
specifically it, but that seems rather unlikely. It certainly isn't
on any well-known public blacklist now (just checked).

There is no obvious way to fix this at our end. We can contact
Gandi in the hope they can track down the culprit and persuade
Hotmail to take them off the blacklist.

For now, please Cc: Grace and Zuan explicitly.

As a band-aid solution I could set up non-hotmail relay addresses for
Zuan and Grace somewhere (like on my own server). That's not a very
sustainable or scalable solution, however - the problem affects all
ncuc lists, notably including ncuc-discuss, and doing this kind of
hack for all hotmail users there would not be exactly convenient.

--
Tapani


Apr 12 23:10:48 ncuc1 postfix/smtp[14189]: 7743EFDC: to=<********@hotmail.com>, relay=mx4.hotmail.com[65.54.188.126]:25, delay=0.72, delays=0.09/0.05/0.44/0.14, dsn=5.0.0, status=bounced (host mx4.hotmail.com[65.54.188.126] said: 550 SC-001 (BAY004-MC4F43) Unfortunately, messages from 92.243.29.158 weren't sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. (in reply to MAIL FROM command))

The link given 

"550 SC-001 Mail rejected by Outlook.com for policy reasons. Reasons
for rejection may be related to content with spam-like characteristics
or IP/domain reputation."


-- 
Tapani Tarvainen


On Tue, Apr 12, 2016 at 09:11:34PM +0000, Grace Githaiga wrote:

> @PeterI have had the same problem. Maryam brought this to my attention day before yesterday. I actually thought that I had been unsubscribed as a result of using my hotmail, as a result not gotten some emails. I realize I am not the only one. Maybe it is the same with Milton. I suspect it is a problem with the system.
> RgdsGrace



> From: Peter Green <**********@hotmail.com>

[...]
 
> Due to issues of excessive mailbox bounces (thanks for Maryam's notification), I was unsubscribed from the EC mailing list for a while. That's why I did not receive emails from the EC for the past couple
>  of weeks, for which I feel so sorry.  Luckily, Rafik sent the email to our individual emails. Thanks for that. 
> 
>
> I  have missed several threads in the EC mailing list, therefore without reponses on my part.  Today I reviewd the archives of the EC
>  mail list, and surprisingly found that I began losing emails from the EC list on 15th, March, with the thread titled "Marrakech follow-up ", which was two days after I was back to
>  Beiing from Marrakech.
> 
> 
> Sorry for such a loss of emails.  I have noted that my mailbox has intermittent connectivity with the EC mailingst and have been trying to find out the
>  problems and then fix it. }}
>