Error in procmail

I put this in a .procmailrc file
              :0
              * > 3000000
              ! test(_at_)domain
to forward e-mail larger than 3Mb.
And in the server this error occurs:
SYSERR(joaopaulo): mime8to7:multipart
nesting boundary too deep.
What's the problem?

How can I delete all mails from the domain microsoft.com? ?

:0h
* ^From.*microsoft
delete_this_email

???????????????

> ³³°°°°³³°°°°³³ªªªª°°§§³²¹¹²³§§°°°°°°ªªªª°³³°°°°³³°°°°³³<
>       João Paulo G. de Andrade                  <
>       joaopaulo(_at_)unimetro(_dot_)com(_dot_)br                 <
>       Setor de Informática                      <
>       Unimed Metropolitana de Salvador         <
> ³³°°°°³³°°°°³³ªªªª°°§§³²¹¹²³§§°°°°°°ªªªª°³³°°°°³³°°°°³³ <


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