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Re: [nmh-workers] post 1.71 ug: "long line"/single newline paragraphs

From: Ralph Corderoy
Subject: Re: [nmh-workers] post 1.71 ug: "long line"/single newline paragraphs
Date: Sat, 26 May 2018 22:44:33 +0100

Hi Anthony,

> Part of EFAIL was that the mail client downloaded bits from the
> Internet and interleaved them seamlessly into the message.

IIRC it was that different adjacent parts were catenated if both
text/html before being sent to something to interpret the HTML.  This
meant the join could produce something unwanted that wasn't detected
when they were separate.

> Ralph Corderoy's message contains a 'Content-Type:
> message/external-body; access-type="url"; url="..."' bit that was
> promptly fetched and displayed in the middle of the message.

About time someone's noticed.  :-)  It's not the first time, though it's
not common.  This time it seemed apt given my pondering about too much
done `out of the box'.

> How do I disable this behavior

Possibly by nobbling nmh-access-url in an mhn.defaults, e.g. /etc/nmh,
though I haven't tested it.  It's `curl -L' here, that should probably
have an `-sS' too.

> and why does nmh have it turned ON by default!?

I don't know.  History, probably.
We used to assume everyone played nice.

Cheers, Ralph.

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