SORBS lists mx2.freebsd.org as open relay

[Dave Hart]

This seems to have been fixed, at least the SORBS lookup webpage says
the listing is "inactive and flagged to NOT be in DNS" or similar.
However so far the authoritative servers for dnsbl.sorbs.net that I
queried are still returning the mx2 hit with their intentionally-painful
2 day TTL.

If you (used to) use SORBS blacklist, make a note on your calendar, in
theory in two days plus whatever slop they have updating their DNS, it
should be possible to use SORBS' open SMTP relay blacklist without
losing freebsd.org list traffic.

Dave Hart