MX for mailhub and reverse pointer file

[Harry Putnam]

Kevin Darcy <kcd at daimlerchrysler.com> writes:

>>;;;Do I need something here like:
>>;;;                     IN      MX      reader.local.net0
>>
> Do you expect folks to be sending mail to user at 0.168.192.in-addr.arpa?

Harry wrote:
> ;;;Do I need something here like:
> ;;;                     IN      MX      reader.local.net0

Sorry, I'm too dense to get the cryptic answer... does it mean no,
nothing goes in there or does it mean something goes in there but not
in that format?

And the log ...

 Feb 9 19:27:53 reader kernel: process `named' is using obsolete
  setsockopt SO_BSDCOMPAT

Do I need to worry about that?