Longer version: I'm trying to change the email address I use to subscribe to press-regional@lists.postgresql.org - the one currently subscribed to it (rod@iol.ie) is no longer active. However, I'm caught in a catch-22, because (i) I can't manually unsubscribe from that particular list in the list manager (I get a message saying that its membership is automatically managed), and (ii) I can't subscribe to it with a different address; the mailing list isn't listed in the "Subscribe" drop-down (presumably because I'm already subscribed with the obsolete address?).
You need to contact the manager of the list (<listname>-owner@lists.postgresql.org) for them to help you with it.
Also notice that you are publishing DMARC policies on rodonnel.ie that prohibit you from posting to mailinglists, which means most of the email you send from that address will end up in peoples spam boxes. I *think* the problem is you are DKIM-signing the fact that there are no list headers -- thus the mailinglists adding list headers prevents it from being redistributed. This will of course also make it harder for you to see your questions (I only noticed this one in my spam folder because of the large number of spam reports we got as a result of you posting). Bottom line is you should not post to a mailinglist from an address that explicitly forbids usage by mailinglists.