MX for mailhub and reverse pointer file

[Harry Putnam]

Setup: Gentoo linux (kernel 2.6.15-r3)
       bind-9.3.2
       sendmail-8.13.4
Using bind/named as simple authoritative home lan server

I want to get a correct MX set for my local lan mailserver but using
the Bind and DNS 4th ed  I don't find examples that are really
complete.  All the index hits on MX still leave me wondering what if
anything needs to go into the reverse pointer file for the zone.

Currently I have this pair of zone files and below the log from
starting named with those in place.

zone.local.net0
------- 8< snip -------- 
$TTL 1D
@		IN SOA    reader.local.net0.  hostmaster (
                        200405191 ; serial
                        8H        ; refresh
                        4H        ; retry
                        4W        ; expire
                        1D )      ; minimum
;[HP 02/09/06 19:25  ] define the authoritative name server
					IN     	NS      reader
; [HP 02/09/06 19:25  ] defind domain mail server with MX record & 
; matching A record
; [HP 01/30/06 09:56 The 10 indicates priority [lower is higher]]
		IN		MX		10	reader
reader		IN		A		192.168.0.4

; define domain functions with CNAMEs
smtp				IN		CNAME		reader
www				IN		CNAME		reader
tic				IN		CNAME           reader

;;;  From Bill Larson
;;;	1.	"@" as the origin for a zone
;;;	2.	Non-fully qualified names will be fully qualified with 
;;;             the $ORIGIN
;;;	3.	When the left hand name isn't specified, it carries
;;;             over from the previous record

localhost				IN		A       127.0.0.1
;; local machines in alphabetical order
ansil					IN		A       192.168.0.21
bjp					IN		A       192.168.0.16
fw					IN		A       192.168.0.20
harvey					IN		A       192.168.0.22
mob2					IN		A       192.168.0.3
wap					IN		A       192.168.0.50
------- 8< snip -------- 

revp.192.168.0  Do I need something in here regarding the MX besides a
                pointer to its A record?

Aside: Does the TTL need to be in the reverse file?  Named complains
       about the SOA record not being at the top.

------- 8< snip -------- 
$TTL 1D 
@    IN SOA  reader.local.net0. reader.reader.local.net0. (
              200405190  ; serial
              28800      ; refresh (8 hours)
              14400      ; retry (4 hours)
              2419200    ; expire (4 weeks)
              86400      ; minimum (1 day)
              )
; define the authoritative name server
                        IN      NS	reader.local.net0.
;;;Do I need something here like:
;;;                     IN      MX      reader.local.net0
; our hosts, in numeric order
3		  	IN 	PTR  	mob2.local.net0.
4		  	IN 	PTR	reader.local.net0.
16			IN 	PTR	bjp.local.net0.
20			IN 	PTR	fw.local.net0.
21			IN 	PTR	ansil.local.net0.
22			IN 	PTR	harvey.local.net0.
50			IN 	PTR	wap.local.net0.
------- 8< snip -------- 

Now about these logs (wrapped for mail), they seem pretty normal except
the one about named using an obsolete setsocket.

Any one know if that is something I need to worry about.

  Feb 9 19:27:53 reader named[24087]: starting BIND 9.3.2 -u named -n 1
  -d5

  Feb 9 19:27:53 reader named[24087]: loading configuration from
  '/etc/bind/named.conf'
 
  Feb 9 19:27:53 reader named[24087]: listening on IPv4 interface lo,
  127.0.0.1#53

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

  Feb 9 19:27:53 reader named[24087]: command channel listening on
  127.0.0.1#953

  Feb 9 19:27:53 reader named[24087]: pri/revp.127.0.0:2: SOA record not
  at top of zone (0.0.  -addr.arpa.0.0.127.in-addr.arpa)

  Feb 9 19:27:53 reader named[24087]: zone 0.0.127.in-addr.arpa/IN:
  loading master file pri/r 7.0.0: not at top of zone

  Feb 9 19:27:53 reader named[24087]: zone 0.168.192.in-addr.arpa/IN:
  loaded serial 200405190

  Feb 9 19:27:53 reader named[24087]: zone local.net0/IN: loaded serial
  200405191

  Feb  9 19:27:53 reader named[24087]: running