LinuxQuestions.org - i need a second pair of eyes

i setup a domain for my mother's friend's daughter...

i cannot find the error in my zone files for this domain
been comparing with other zone files for hours.

the error i'm getting from
dnsreport is the mail server
wont eccept mail to postmaster.

Code:

; Zone file for lookinthru.org

;

; The full zone file

;

$TTL 1D

@      IN      SOA    ns.lookinthru.org. postmaster.lookinthru.org. (

                        160320051      ; serial, todays date + todays serial #

                        2H              ; refresh, seconds

                        2H              ; retry, seconds

                        1W              ; expire, seconds

                        1D )            ; minimum, seconds

;

                NS      ns              ; Inet Address of name server

                MX      10 lookinthru.org.    ; Primary Mail Exchanger

;

localhost      A      127.0.0.1



gw              A      192.168.1.1

                TXT    "router"

mail            A      64.81.123.123

                MX      10 mail

maybe someone else might see the problem?

thanks