no longer receiving spam report emails

Hello;

In the past when I submitted spam by email
(to:submit.[id]@spam.spamcop.net), I would eventually get an email back
from Spamcop with a link to a report form, where I could approve the
reporting of the spam.  However, for about the last week I haven't been
getting the emails back from Spamcop containing these links.  I haven't
accidently added Spamcop to my blocked sender list, etc.  Anyone else
having this problem?

Thanks in advance.