03 Oct 23: One server has been relocated, the server currently doesn't have a public IP address in the meantime. I wrote some additional tunnel code running separately to handle this. When the server is engaged the connection is 5600+ days uniform (since around 24 July 2008). In the unlikely case I disengaged the server because of some problem the retention is 1200-3800 days depending on newsgroup. If you experience any issue please let me know.
29 Nov 23: Because of encrypted and "obfuscated" flood mass posted by few nzb websites and newzbin-like communities using usenet servers as private storage for their members to download the posts - the situation with the content is pretty chaotic, since posts are disguised in such a way, that users must use the satellite ecosystem (whish is not a part of Usenet) exclusively to download them, when the website disappears - the encrypted scattered posts just eat usenet providers' disk space uselessly. If you can't find something specific please let me know what exactly you can't find for me to check how it is possible to retain the posts. Legible posts shouldn't be affected at all, let me know if you notice anything missing.
08 Aug 24: After being unchanged for many years the search service communication protocol had to be updated a few times in part to resolve a server side set feature limitation and properly handle trial searches on the relocated server. The searches themselves are not affected and it looks like the work is now complete.
Which settings in Newsgroups>Properties for a newsgroup to only retrieve new headers do I need to set (and which values)?
I would assume that upon adding a newsgroup, it would
retrieve all headers the first time
then next week it would retrieve only the headers not yet retrieved while keeping the existing headers, read or unread as well as not loading any existing header that have been deleted.