For about the past 18 hours, you may have experienced issues sending emails to perl.org/cpan.org/pm.org addresses, if those emails contained a reference to any .org URI. One of the uribl providers we use accidentally added all of .org to their list of things to block.
This has likely resulted in mail being permanantly rejected, and it will not be resent. If you sent such an email, you should have received a bounce message from your mail provider. If you are subscribed to any other .org email lists via your cpan.org address, you may wish to double check that you haven't been unsubscribed due to bouncing.
We have disabled the errant uribl provider, and informed them of the issue. We may not re-enable them after they fix the problem. (Although, historically, their data has been a very good signal for blocking spam.)