Does SC mail block any attachments?

Patto <[email protected]> Mon, 13 Feb 2006 12:31:36 +0900

Newsgroups	gmane.mail.spam.spamcop.email
Organization	Spamcop
Message-ID	<[email protected]>

I need to find out if my company's mail server blocks any outgoing 
messages with certain attachments. In order to test this, I need to send 
to a mail server that does not block anything. Does SC block anything 
completely, or should I see any messages either in my Inbox, or in the 
Held Items queue?