[Mailman-Users] Facebook invite not rejected

[Russell Clemings]

A Facebook invite from invite+zrdoovf=cerf at facebookmail.com got posted
to two of our lists last night and I can't figure out why it wasn't
rejected. It came from a user who was subscribed to both lists, but at
a gmail address. I suspect he gave Facebook access to his address book
but as I said that facebookmail.com address is not a subscriber.

generic_nonmember_action is reject
forward_auto_discards is yes
accept_these_nonmembers. hold_these_nonmembers,
reject_these_nonmembers and discard_these_nonmembers are all empty

but ... (listname masked here, the rest is accurate)

/usr/local/cpanel/3rdparty/mailman/logs/post:20404:Nov 15 01:12:06
2009 (13887) post to listname-talk from
invite+zrdoozozoigf at facebookmail.com, size=3308,
message-id=<7f9ef7cb2a8b3dff5957c17d3bb09ace at 10.16.160.197>, success
/usr/local/cpanel/3rdparty/mailman/logs/post:20405:Nov 15 01:12:07
2009 (13887) post to listname-teach from
invite+zrdoovf=cerf at facebookmail.com, size=3332,
message-id=<708a4ec208c585f01494cd7393f0b309 at 10.16.160.197>, success

Nothing in the other logs (except smtp) and nothing fishy in the
headers that I can see.

I'm mystified. Any ideas? These things have always been rejected before ...

(Yes, I know, cPanel ... sigh.)

rac