Title: Read quoted-printable emails with qprint
       Author: Solène
       Date: 27 October 2023
       Tags: openbsd linux unix
       Description: In this article, you will learn about quoted-printed
       encoding, and how to decode it with qprint
       
       # Introduction
       
       You may already have encountered emails in raw text that contained
       weird characters sequences like `=E3` or `=09`, especially if you work
       with patch files embedded as text in emails.
       
       There is nothing wrong with the text itself, or the sender email
       client.  In fact, this shows the email client is doing the right thing
       by applying the RFC 1521.  Non-ASCII character should be escaped in
       some way in emails.
       
 (HTM) RFC 1521: MIME part one
       
       This is where qprint enters in action, it can be used to encode using
       the quoted-printable, or decode such content.  The software can be
       installed on OpenBSD with the package named `qprint`.
       
 (HTM) qprint official website
       
       I already introduced qprint in a blog post in a guide about OpenBSD
       pledge.
       
       # What does quoted-printable look like?
       
       If you search for an email from the OpenBSD mailing list, and display
       it in raw format, you may encounter this encoding.  There isn't much
       you can do with the file, it's hard to read and can't be used with the
       program patch.
       
 (HTM) Email example featuring quoted-printable characters
       
       A sample of the email looks like that:
       
       ```
               From italiano-=E6=97=A5=E6=9C=AC=E8=AA=9E (=E3=81=AB=E3=81=BB=E3=82=93=
       =E3=81=94) FreeDict+WikDict dictionary ver.
               2022.11.18 [itajpn]:
       =09
                 ciao //'=CA=A7ao// <interjection>
                 =E3=81=93=E3=82=93=E3=81=AB=E3=81=A1=E3=81=AF
       =09
       ```
       
       If you pipe this content through the command `qprint -d`, you will
       obtain a much more interesting text:
       
       ```
               From italiano-日本語 (にほんご) FreeDict+WikDict dictionary ver.
               2022.11.18 [itajpn]:
               
                 ciao //'ʧao// <interjection>
                 こんにちは
               
       ```
       
       There is little use in encoding content with qprint, but it could do it
       as well.
       
       # Conclusion
       
       If you ever encounter this kind of encoding, now you should be able to
       figure what it is, and how to read it.
       
       Qprint may not be available on all systems, but compiling it is quite
       easy, as long as you have a C compiler and make installed.