[Mimedefang] Reject 451 (Please try again later) messages

[Justin Shore]

Bill,

Did you ever get your 451 errors sorted out?  If so, could you summarize 
for the list?  I too am experiencing them.  It's gotten to the point where 
my Sendmail and MD installation is all but unuseable and extremely 
unreliable.  I have a cronjob restart MD and Sendmail every 5 minutes to 
cope with the matter.  I've even disabled AV checks in their entirety.  If 
you found a solution, I'd love to hear what it was.

Justin