I orginally made it settable because I had no knowledge of what other
custom headers are out there, especially things that people do with
scripts which is one of the strong features of nmh. I don't care what
the default is but would like to have some way to avoid breaking other
stuff out there of which I'm unaware since not breaking things is part
of the nmh creed.
Not breaking things is part of the nmh creed? It wasn't without controversy,
but I seriously broke things (including, IIRC, your mail setup) when we
required a From line in drafts. Also, I broke things for the MH-E people
when we started processing all component files with mh-format in 1.5.
Okay, fine. We don't like breaking things without a good reason. Here's
my take on this (in addition to the parts about it being shorter and
compatible with mutt).
- In the new world order, we're running mhbuild all of the time (which I
know you're not a fan of, but I think you're in the minority on this
one, sorry). This means that there has to be communication between
the attach command (in whatnow or whereever) and mhbuild on what
header they're using. This is actually architecturally complicated,
especially since you could run mhbuild by yourself.
- We already have a number of headers which control internal nmh
functionality (Envelope-From, Fcc, Dcc), and those aren't
configurable. In fact, the attach header is the ONLY header name that
is configurable.
- The fact that you HAD to configure it before was part of the reason it
wasn't wildly adopted. So having this configurable is confusing.
It's better now that there's a default.
- I am very skeptical that an Attach: header would conflict with what
anyone is doing (I mean, really ... what would they be doing?) It's
possible, but "highly unlikely" I think is generous. I had zero
qualms about implementing Envelope-From, and I feel the same way here.
So, in summary: tougher to implement with new code coming, confusing to
users, and unlikely to conflict with anyone.
--Ken
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