
MIME in Arachne
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Arachne supports MIME V1.0 and many extensions to it.

Outgoing binary attachments are encoded using base64 algorithm, for text
attachments Arachne uses quoted-printable algorithm. For eMail body,
you can choose either 7bit, 8bit or quoted-printable encoding -
you can configure this from Desktop | Options | Network preferences.

Multiple files attached to single message will be all extracted to
CACHE subdirectory, so if you are sending HTML page to Arachne user,
you can easily use relative links like <A HREF="file1.htm"> or
<IMG SRC="file2.gif">, if these files are attached to the same message.

However, Microsoft Outlook uses more complicated way to link multiple
objects in eMail message, called "Content-ID". Arachne is currently able
to generate Content-ID, which looks like "arachne-namespace/filename",
so it is easy to create links to such objects. In this version (1.41 beta),
Arachne doesn't support "cid:" pseudo-protocol, which is required to access
these objects (eg. cid:arachne-namespace/mybackground.gif).

"cid:" protocol will be implemented later.