This isn't really an error but an informative message of inn. It also
appears with 'checkpoint' instead of 'closed'. This message tells you how
long a connections from the remote existed, how many articles were accepted
from this remote site, how many innd already had of those offered and how
many were rejected of some reason (see below). If you get a lot of rejects
from a site then you should investigate, as there might be some problems.

Erland Sommarskog, <sommar@algonet.se> explains further:
  Rejected articles are articles in groups that you don't have in your active 
  file, or you ban in hosts.nntp. This could be groups you have missed to add, 
  it could be groups you don't want. Also articles which are already too old
  for you to accept (-c switch to innd) fall in this part. 

If you get many rejects then you might also check out the clocks on
the sender and receiver machines as it might be that with wrong clock
settings articles get refused which seem to be to old or posted in
future.

  Refused articles are articles that are already present in your
  history file, and which for some reason are being offered to  
  you again. If you have more than one incoming feed, you are
  likely to get a fairly high number in the Refused column. If
  you are a leaf site with only one incoming feed you can still
  get high numbers in this column, if you have a longer expiration
  time (including /remember/) than you feed has. 

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