[ARIN-consult] Consultation on Prohibiting Attachments on ARIN Mailing Lists

Owen DeLong owen at delong.com
Tue Apr 24 12:29:14 EDT 2018

> On Apr 24, 2018, at 08:35 , Gert Doering <gert at space.net> wrote:
> Hi,
> On Tue, Apr 24, 2018 at 10:56:06AM -0400, William Herrin wrote:
>> On Tue, Apr 24, 2018 at 8:23 AM, Gert Doering <gert at space.net> wrote:
>>> On Tue, Apr 24, 2018 at 08:21:36AM -0400, ARIN wrote:
>>>> * Question:  Should attachments be prohibited on ARIN public
>>>> mailing lists?
>>> I do not have a particular opinion on that, but *if* you disallow attachments,
>>> please make it smart enough to not break PGP-signed mails in MIME format
>>> (which come with an "attachment" for the signature) in the process.
>> Hi Gert,
>> "Not break" as in maintain the signature or "not break" as in don't
>> strip the signature and then keep the multipart/signed content-type
>> breaking the validator?
> "do not fumble with mail that is PGP signed", not in any way.  
> Do not modify the body, those header parts that are covered by the 
> signature, or the signature itself, or the MIME structure tieing parts
> together.

What you are effectively arguing for here is “Allow attachments as long
as the message at least pretends to be PGP signed.”

If we’re going to block attachments, then we should do so.

If not, then I’m fine with that.

However, in deference to the PGP signed aficionados, I would suggest that
we pass (unaltered) any PGP signed message which contains only text/plain,
text/ascii, text/rtf, and PGP-related MIME parts. For others, we should
return an error message to the poster explaining that attachments are not
allowed, but PGP signatures are still permitted.


>> Personally, I wouldn't mind seeing all emails squashed to a single
>> MIME text/plain part. It might even improve the quoting mess where a
>> lot of mail software can't figure out how to mark the components of
>> the mail or sometimes indents an entire paragraph unwrapped instead of
>> indenting the lines.
> I would totally second *that* :-) - but I'm afraid that was not the
> question asked.
> Gert Doering
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