Quoting Michael Paoli (Michael.Paoli@cal.berkeley.edu):
I think I generally, if not entirely, have callouts (at least SMTP callouts) disabled.
I hope you understand that was just an offhand guess. I really wouldn't know root cause, but your bit about swap seems entirely likely.
Delisting? It, understandably, is an automated process - and did submit for delisting. Nothing's shown up ... yet - not email nor reject. But it's not super clear how quickly those happen - may take hour(s) to a day or so.
This is annoyingly typical.
It's not unknown for their checking scripts to simply glitch.
Also, http://multirbl.valli.org/lookup/balug.org.html looks moderately out-of-date. It shows listing on bl.fmb.la - but in checking source - both web and DNS - that's already cleared.
How odd. multirbl.valli.org purports to spawn off real-time checks of each of the several hundred DNSBLs, or that's my understanding. Anyway, glad checking the individual DNSBL found no listing.