I'm not the only one seeing this problem and I'm pretty sure that we all understand how the mailing list works. We've all been active for years, even prior to there being such thing as "nanog-post" so, something is happening on that end that shouldn't be.

I haven't had problems posting, but a few months ago, I also was mysteriously unsubscribed from the nanog list. I don't know if it was a glitch in the mailing list manager software or enemy action (of course, I'm a security guy, so I always wonder about enemy action...). --Steve Bellovin, http://www.research.att.com/~smb