> My problem is (was, I hope) that I seemed to be getting posts from
> both "peered" lists, and was subscribed to the SEARN.SUNET.SE one
> under an address which no longer exists. I've now spoofed my old
> address and unsubbed from that one; if you're reading this I presume
> that it didn't unsub me from PEACH.EASE.LSOFT.COM as well . . .

No it didn't.

> > LSTOWN-L is a peered list, which also runs at @SEARN.SUNET.SE
>
> I'm not sure why this is done, what the advantages are, or why I'd
> suddenly have started received postings from the SEARN list when I
> changed my address on the other one . . . maybe this isn't relevant
> to LSTOWN-L, but on the other hand, maybe it is.

You can read about peered lists here:

http://www.lsoft.com/manuals/1.8d/owner/owner.html#2.13.10

If I'm understanding correctly, once you have an address on one peer which
is not on the other, then you would get mail from that peer.