This is common on many servers. They have a hard cap of 125 million headers on every group which on a large group might only be 30-60 days.
It's easy to tell if this is the case. In the options, network turn on "Show Server Commands". Then right click a group and "Download Latest" on it. Then check the logs.
[13:23:15] LOW InterSocket - SSL Connection Server: news.giganews.com Stats: AES256-SHA 256 TLSv1/SSLv3
[13:23:15] HIGH NNTPSocket - XFEATURE COMPRESS GZIP
[13:23:15] HIGH NNTPSocket - GROUP <bla bla>
[13:23:15] HIGH NNTPSocket - 211 1056210953 226921634 1283132586 <bla bl>
[13:23:15] HIGH NNTPSocket - XOVER 1282699487-1282999487
[13:23:15] HIGH NNTPSocket - 211 1056210953 226921634 1283132586 <bla bl>
211 - A-ok
1056210953 - total records
226921634 - Min range
1283132586 - Max range
1,056,210,953 - total records. So this group has more than 1 billion posts in it. It's not the largest group either. If you do a larger group and only see 125 million headers, the problem is the server.
Pretty sure Easynews is one of these servers.
Any ideas, mods/techs? fwiw - I've had header retrievals crash with an error message saying something about "byte limit reached." I checked with Easynews, they said the limit wasn't on their end,
I suspect they're lying to you. It's common for servers to limit total transfers on a connection and then force a disconnect. It doesn't matter to Newsbin, it just re-connects and continues the download.