The mailing list for listmasters using Sympa

[IKEDA Soji <address@concealed>]

2017/11/07 17:41、David Verdin <address@concealed> のメッセージ:

> Yes, That html-only reception mode is really a reflection from the past. We 
> should remove it, it is meaningless now. And it is a source of problems, 
> too.

I agree.  David, could you please submit this to issue tracker?

Regards,
-- Soji

> Regards,
> 
> David
> 
> 
>> On 01/11/2017 09:47, Xand Meaden wrote:
>> Thanks Paul and Jan. That does seem to be the trigger - setting the list
>> to HTML-only mode, and then sending an HTML message with the attachment:
>> the attachment is removed. Interestingly if the message is plain text,
>> both it and the attachment are successfully delivered!
>> 
>> Regards,
>> Xand
>> 
>>> On 01/11/17 08:08, Engels, Jan wrote:
>>> Hi,
>>> 
>>> yes, we've also experienced this problem with the 'html-only' setting. 
>>> The problem seems to
>>> be related with the encoding/structure of the raw e-mail and not with the 
>>> attachments themselves.
>>> I could successfully re-send an email to the same mailing list with the 
>>> exact same attachment (pdf) that
>>> was previously ripped off by sympa. The problem only ocurred when 
>>> re-sending the exact same raw e-mail.
>>> Unfortunately I was not able to find what exactly is causing the problem 
>>> :(
>>> 
>>> Below (between ##### ) you can find the headers of such an e-mail (with 
>>> all sensitive information removed).
>>> 
>>> The pdf from this e-mail got ripped off by sympa but it could still be 
>>> found in the sympa archive from this
>>> list.
>>> 
>>> Hope this helps.
>>> 
>>> Cheers
>>> Jan
>>> 
>>> #####################
>>> 
>>> Date: Mon, 31 Jul 2017 15:50:14 +0200 (CEST)
>>> From: "..." <...@...>
>>> To: ... <...@...>
>>> Message-ID: <...@...>
>>> In-Reply-To: <...@...>
>>> References: <...@...>
>>> MIME-Version: 1.0
>>> Content-Type: multipart/mixed;
>>>    boundary="----=_Part_3551695_666232279.1501509014903"
>>> X-Mailer: ...
>>> Thread-Topic: ...no 3 (test with pdf attachment)
>>> Thread-Index: AdMBTEO3K4TdIWxfTrypMhhV47mvpVMDYMRb
>>> Subject: [...] ...no 3 (test with pdf attachment)
>>> Reply-To: ...@...,"..." <...@...>
>>> X-Loop: ...@...
>>> Errors-To: ...@...
>>> Precedence: list
>>> Precedence: bulk
>>> Sender: ...@...
>>> X-no-archive: yes
>>> List-Id: <...@...>
>>> List-Help: <mailto:address@concealed?subject=help>
>>> List-Subscribe: <mailto:address@concealed?subject=subscribe%20...>
>>> List-Unsubscribe: <mailto:address@concealed?subject=unsubscribe%20...>
>>> List-Post: <mailto:...@desy.de>
>>> List-Owner: <mailto:...@desy.de>
>>> List-Archive: <https://.../sympa/arc/...>
>>> Archived-At: <https://.../sympa/arcsearch_id/.../2017-08/...>
>>> 
>>> ------=_Part_3551695_666232279.1501509014903
>>> Content-Type: multipart/alternative;
>>>    boundary="=_f6d1ac49-4489-4cc0-9920-ced94fb285f4"
>>> 
>>> --=_f6d1ac49-4489-4cc0-9920-ced94fb285f4
>>> Content-Type: text/plain; charset=utf-8
>>> Content-Transfer-Encoding: quoted-printable
>>> ...
>>> ...
>>> ...
>>> --=_f6d1ac49-4489-4cc0-9920-ced94fb285f4
>>> Content-Type: text/html; charset=utf-8
>>> Content-Transfer-Encoding: quoted-printable
>>> 
>>> --=_f6d1ac49-4489-4cc0-9920-ced94fb285f4--
>>> 
>>> ------=_Part_3551695_666232279.1501509014903
>>> Content-Type: application/pdf; name="....pdf"
>>> Content-Disposition: attachment;
>>>  filename=....pdf"
>>> Content-Transfer-Encoding: base64
>>> ...
>>> ...
>>> ...
>>> ------=_Part_3551695_666232279.1501509014903--
>>> 
>>> #####################
>>> 
>>> 
>>> 
>>> 
>>> 
>>> ----- Original Message -----
>>> | From: "Paul Barton" <address@concealed>
>>> | To: address@concealed
>>> | Sent: Tuesday, 31 October, 2017 20:28:20
>>> | Subject: Re: [sympa-users] Attachments removed from messages
>>> 
>>> | Check to see if the list in question is set to 'html-only' for either
>>> | the default reception or even on a per-subscriber basis. We found that
>>> | PDF attachments from Gmail senders often get blocked if a
>>> | list/subscriber is html-only since PDF's aren't HTML.
>>> |
>>> | -Paul
>>> |
>>> | * address@concealed (address@concealed) wrote:
>>> |> We are running Sympa 6.2.22, though this problem started before the 
>>> latest
>>> |> upgrade. Users have reported to us that some of the attachments being 
>>> sent to
>>> |> their mailing lists are being mysteriously removed from the message the
>>> |> subscribers receive. The same thing can happen with inline images.
>>> |>
>>> |> We have a large number (several thousand) of mailing lists and the 
>>> problem
>>> |> seems to affect different lists at random. Also, if the missing 
>>> attachment is
>>> |> re-sent to the same list a few minutes later, it will usually be 
>>> delivered, so
>>> |> it's very hard for us to reproduce. When viewing the Archive for that 
>>> mailing
>>> |> list, the attachment is there. We have compared the Exim MTA logs 
>>> (running on
>>> |> the Sympa server) and can see the size of the outgoing message is much 
>>> smaller
>>> |> than the one that arrives - so it is not some external system removing 
>>> the
>>> |> attachments.
>>> |>
>>> |> I wonder if anyone has experienced this issue or has any suggestions?
>>> |>
>>> |> Thanks,
>>> |> Xand
>>> |>
>>> |> --
>>> |> Xand Meaden | Server Infrastructure Officer
>>> |> IT Development, Information Services, University of Kent
>>> |> Room S21, Cornwallis South
>>> |> Canterbury, Kent, CT2 7NF, UK
>>> |>
>>> |> www.kent.ac.uk/itservices | @UnikentUnseenIT
>>> |
>>> | --
>>> | Paul Barton <address@concealed>
>>> | Lead Linux Systems Administrator
>> 
> 
> -- 
> "Mieux vaut viser la perfection et la rater que viser la médiocrité et 
> l'atteindre."
> - Francis Blanche
> 
>