Actually, you might want to call up the company/organization you’re trying to reach and tell them about your problem. (They could have it misconfigured and are blocking out people they don’t want to block, like yourself.) And their techi people should be able to help you out a lot more effectively.
yes, particularly because I’m STILL being blocked even after their person sends an outbound message to ME. That should have whitelisted me, but apparently it didn’t.