Being reachable by other admins is what I was referring to[1]. I do aggressively block pure-spam hosts, of course, but I can't consider FB one of those. [1] I

Being reachable by other admins is what I was referring to[1]. I do aggressively block pure-spam hosts, of course, but I can't consider FB one of those. [1] I find it exceedingly unlikely that FB mail admins would need to reach me to troubleshoot something, but it is the principle.