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Mailcap and Mime Types

The ".mailcap" file is used to find a program for handling a mime (filetype).

  video/mpeg; xmpeg %s

The "/etc/mime.type" file associates filename extensions with mime types

For example
   text/plain     txt
   text/html      htm   html

Netscape used a different format

   type=text/html exts=htm,html

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Basic Base64 Encoding/Decoding...

(Moved to misc/cryto_base64.txt)

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Using mhbuild

Add attachments to the mailfile (with headers)

   #image/x_png; name="arc.png" arc.png

Then filter in VI using...

   :%!mhbuild -

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General Mail Mime Attachment handling

Attachment Filename
  The file name must be added to the "Content-Type:" line of the
  attachment.

  EG: ------- =_aaaaaaaaaa0
      Content-Type: application/octet-stream; name=".plan"
      Content-ID: <10662.1005524452.1@kobold>
      Content-Transfer-Encoding: base64

Boundary Lines
  Note that two extra "-" are prepended to the actual boundary lines
  to the bundary marked given in the header of a mime mail.

  EG: In the header you have...

     Content-Type: multipart/mixed; boundary="----- =_aaaaaaaaaa0"

  In the body you have...

      ------- =_aaaaaaaaaa0

  The header has 5 "-" characters but the actual boundary line has 7.


Example...
  MIME-Version: 1.0
  Content-Type: multipart/mixed; boundary="----- =_aaaaaaaaaa0"
  Content-ID: <10662.1005524452.0@kobold>

  ------- =_aaaaaaaaaa0
  Content-Type: application/octet-stream; name=".plan"
  Content-ID: <10662.1005524452.1@kobold>
  Content-Transfer-Encoding: base64

  CkFudGhvbnkgVGh5c3NlbiA8YW50aG9ueUBjaXQuZ3UuZWR1LmF1PgogIFdXVyBIb21lIFBh
  Z2U6ICAgICAgIGh0dHA6Ly93d3cuc2N0Lmd1LmVkdS5hdS9+YW50aG9ueS8KICBKb2IgRGVz
  LS0tCgo=

  ------- =_aaaaaaaaaa0
  Content-Type: text/plain; charset="us-ascii"
  Content-ID: <10662.1005524452.2@kobold>

  Anthony Thyssen ( System Programmer )
  http://www.cit.gu.edu.au/~anthony/

  ------- =_aaaaaaaaaa0--

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Using mhbuild

Add attachments to the mailfile (with headers)

   #image/x_png; name="arc.png" arc.png

Then filter in VI using...

   :%!mhbuild -


-------------------------------------------------------------------------------
General Mail Mime Attachment handling

Attachment Filename
  The file name must be added to the "Content-Type:" line of the
  attachment.

  EG: ------- =_aaaaaaaaaa0
      Content-Type: application/octet-stream; name=".plan"
      Content-ID: <10662.1005524452.1@kobold>
      Content-Transfer-Encoding: base64

Boundary Lines
  Note that two extra "-" are prepended to the actual boundary lines
  to the bundary marked given in the header of a mime mail.

  EG: In the header you have...

     Content-Type: multipart/mixed; boundary="----- =_aaaaaaaaaa0"

  In the body you have...

      ------- =_aaaaaaaaaa0

  The header has 5 "-" characters but the actual boundary line has 7.


Example...
  MIME-Version: 1.0
  Content-Type: multipart/mixed; boundary="----- =_aaaaaaaaaa0"
  Content-ID: <10662.1005524452.0@kobold>

  ------- =_aaaaaaaaaa0
  Content-Type: application/octet-stream; name=".plan"
  Content-ID: <10662.1005524452.1@kobold>
  Content-Transfer-Encoding: base64

  CkFudGhvbnkgVGh5c3NlbiA8YW50aG9ueUBjaXQuZ3UuZWR1LmF1PgogIFdXVyBIb21lIFBh
  Z2U6ICAgICAgIGh0dHA6Ly93d3cuc2N0Lmd1LmVkdS5hdS9+YW50aG9ueS8KICBKb2IgRGVz
  LS0tCgo=

  ------- =_aaaaaaaaaa0
  Content-Type: text/plain; charset="us-ascii"
  Content-ID: <10662.1005524452.2@kobold>

  Anthony Thyssen ( System Programmer )
  http://www.cit.gu.edu.au/~anthony/

  ------- =_aaaaaaaaaa0--

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