Bruno Wolff III <bruno@wolff.to> writes:
> I usually use majordomo@postgresql.org as the address to send mailing
> list commands to, though it is possible the address you tried works
> as well.
majordomo worked the last time I tried it.
Rather than unsubscribing (and losing all your settings) I'd suggest
selecting the "nomail" subscription mode while you're on vacation.
Sending "help" and "help set" to majordomo should provide the details.
regards, tom lane