I'm mad after typing up a message.

[KC9UDX]

I try to join https://pairlist5.pair.net/mailman/listinfo/coco/ and after typing up a message I found out I was rejected. Has anyone ever had a problem with them?

I've had this happen on other lists in recent years. It happens to me because the address I use for receiving messages on the list is not the address that I use for sending messages to the list. (Again, I've no experience with the list you're having trouble with, but others).