Re: Sending mail: line wrapping and quoted-printable encoding

[Radu Butoi <rbutoi@gmail.com>]

Radu Butoi <rbutoi@gmail.com> writes:

> Hello all,
>
> I've recently set up my mail in Emacs, and it works well. Gmail, though,
> doesn't support [1] format=flowed, resulting in the hard-to-read comb
> effect when viewing on mobile, which I'd like to avoid. Doing some more
> research, I see that the quoted-printable encoding (which Gmail does
> support [2], and I've confirmed) can also be used to avoid hard line
> breaks while keeping under the line length limit.
>
> Now, I'd like to configure Emacs to send mail using this encoding. To
> test this I overwrite `sendmail-program` to log what Emacs sends.
> Reading the message-mode and Emacs MIME manuals, I tried setting the
> following variables:
>
> (setq
>  mm-content-transfer-encoding-defaults
>  '((".*" quoted-printable))
>  mm-body-charset-encoding-alist
>  '((iso-8859-1 . quoted-printable)
>    (utf-8      . quoted-printable))
>  mm-use-ultra-safe-encoding t)
>
> When sending, no encoding to quoted-printable is done (and there's no
> Content-Transfer-Encoding header). To try to debug this further,
> inserted the following into a buffer and ran M-: (mml-to-mime)
>
> test test test <...longer than 78 columns...>

Sorry, I forgot to escape this. It should say (I was trying to write an
MML definition to explicitly set the encoding):

<#part type=3D3Dtext/plain encoding=3D3Dquoted-printable>
test test test <...longer than 78 columns...>
<#/part>

>
> And there is still no encoding header or wrapping with =. Does anyone
> know what is going on here?
>
> More generally, since I'm new to terminal-based email, what is the
> etiquette around hard-wrapping (or not)? Would it be rude to send
> paragraphs as one logical line (wrapped-in-transmission by
> quoted-printable) and expect people to soft-wrap?
>
> Thanks in advance,
> Radu
>
> [1]: https://useplaintext.email/, and many blog posts mentioning the
> same. It seems like Gmail used to support this, from the screenshot in
> https://github.com/legoscia/messages-are-flowing.
>
> [2]: https://mathiasbynens.be/notes/gmail-plain-text