"Post undeliverable to some recipient channels"
When posting to a channel there's a pink-bordered message that says "Post undeliverable to some recipient channels." The posts' delivery report says that those 2 channels are hub.disroot.org and start.hubzilla.org. ("undeliverable/unresponsive site")
There is no one on those channels currently inhabiting my connections list. So it seems that hubzilla is attempting to send to former connections. If that's true, it might also mean that if I removed someone from my contacts list, or they removed themselves from mine, my hub would continue to post to them anyway.
