Note that there are two other instances of illegal filenames (the code referenced below does special character handling).

1/ Filenames cannot have two periods in a row (ie "thisfile..doc" illegal) 2/ You cannot create a folder called "Forms" in the top level of document library, this is a reserved name (would have been nice it they called it "_Forms")
From: Lisa Parris
Posted At: January 28, 2005 3:54 AM
Posted To: microsoft.public.sharepoint.portalserver
Conversation: copy mails in public folders
Subject: Re: copy mails in public folders

nntp://msnews.microsoft.com/microsoft.public.sharepoint.portalserver/<eA91zdRBFHA.2112@TK2MSFTNGP09.phx.gbl>

This isn't exactly what you're looking for but maybe this might help:

http://www.wssdemo.com/blog/Log/DisplayLog.aspx?ID=66
"Lynn" <moley_cruz@yahoo.com.au> wrote in message
news:1106790720.604518.181780@z14g2000cwz.googlegroups.com...
> hi,
> how can i automate copying of mails in public folders to sharepoint
> Shared Documents ?
> thanks
>