Failed to deliver

[Karsten Kühn]

  Hello, can anybody explain what this means?
  I am accustomed to use letters to form words. In combination with other 
words they form texts.
Until now, I hadn't known that my language consists of "multipart"


kakue

Failed to deliver to '<ibook at lists.themacintoshguy.com>'
LIST module(list ibook at lists.themacintoshguy.com) reports:
  Your message cannot be posted.
  It has the content-type: multipart/alternative,
  and this list accepts text only

Reporting-MTA: dns; mail.ninewire.com

Original-Recipient: rfc822;<ibook at lists.themacintoshguy.com>
Final-Recipient: LIST;submit
Action: failed
Status: 5.0.0