Strip CC & BCC from mail

Hi,

I use gotmail to forward email from my hotmail address. My ISP has
blocked my access to their smtp server however because I was sending
huge amounts of mail. I think this is because bcc and cc are kept, and
thus my ISP sends mail to all these people that are on the cc,bcc list.

I have been looking at the gotmail script but am a little confused about
the sub doResendSMTPEmail. Can anybody shed any light on:

   if ($email =~ s/^From ([^ ]*).*\n//) {
     $from = $1;
   }

Does it remove the From address from the mail? Shouldn't it be '^From:
([...' ? (Notice the ':'). Can I use something similar to remove the CC
and BCC lines?

   $email ~= s/^Cc: ([^ ]*).*\n//;
   $email ~= s/^Bcc: ([^ ]*).*\n//;

How about multiple CC and BCC lines?

Thanks in advance,

Micha.