one key point of communicating with the list is that you have to send from an email that is subscribed to the list, it has to be a perfect match, or the list software will discard it.
Of course, unfortunately, this setting makes it impossible to use aliases for this list, unless you're okay with not ever posting anything.
Actually, it's not impossible at all. On lists that I manage, people routinely get around this by subscribing from multiple aliases and then setting all but one such subscriptions to "nomail." They can then post from different aliases without getting 2-3 copies of every list message. And given the number of spam messages that get sent to (and auto-discarded from) those lists anyway, I suspect that if Jeremy were to change this setting to a more open-ended one, the list would be awash in genuine spam, rather than just people struggling to recover their lost settings. Cheers Gil