Well, it's not just you. While not all my messages are getting blocked I
did have problems with one message (and apparently you are having some luck
too). I have a post I tried to send 2 days ago and it has yet to appear
in the groups, and I've sent it 6 or 7 times so far. What's weird, is that
I've sent a dozen other messages and they've all appeared promptly. I can't
figure out for the life of my why it would happen. There's nothing rude,
vulgar, offensive or spam like in the message so there's no reason for it to
get blocked (judging from the other crap I've seen this doesn't seem like a
likely scenario anyways). I've even tried from a different client. I did
try sending from a "third-party" usenet server and the message did appear on
their server but it didn't replicate to MS's Usenet server (not sure if
that's how things should work though). Very puzzling.
Short answer: It happens. I've seen posts I made bounce around who
knowns where for up to a week, then suddenly show up. Sometimes I've
seen people's posts appear in spurts that are weeks old. I'm sure you
already know, but for those that don't when you post to a newsgroup it
gets uploaded to whatever news server your ISP uses or in my case to a
premium news server which anyone can subscribe to. From there your
post is handed off to a network of linked news servers. There are
thousands of them all over the world. Once in awhile a news server
(which is just another computer and probably a PC) acts up. If nobody
is monitoring what's going on it can overflow meaning it no longer has
capacity to accept more new posts from other news servers it peers
with. If you happen to be on the down stream of said server when this
happens you may not see some posts but that doesn't mean others aren't
since they are accessing your posts from their news servers which
probably took a different path to reach them. Ditto if a router goes
down. It will effect some, not all.
I doubt anybody is blocking anything.