|     On another topic,  my Century ISP is having difficulty with mail I
|have been receiving recently.

If this problem is local to one user, or one ISP, then that is where your
focus should be.  Not all ISPs are created equal, nor are their Internet
connections.  You could try futzing (that's a highly technical term ;-))
with various distribution options MIME/NOMIME SHORTHDR/FULLHDR, DIGEST/MAIL.