question about reverse lookup

[Boex,Matthew W.]

we are having a mail problem with a domain.  na.bestfoods.com.  sendmail
seems to be choking on it's reverse lookup.  here is what i get when i run a
dig na.bestfoods.com and dig -x on their ip address.  correct me if i am
wrong but isn't having an alias for a reverse ip bad, wrong?  and could this
be hosing sendmail?

--------------------------------------------------------------------
dig na.bestfoods.com mx

; <<>> DiG 8.3 <<>> na.bestfoods.com mx 
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3
;; QUERY SECTION:
;;      na.bestfoods.com, type = MX, class = IN

;; ANSWER SECTION:
na.bestfoods.com.       23h30m32s IN MX  10 wss3.na.bestfoods.com.

;; AUTHORITY SECTION:
bestfoods.com.          23h30m32s IN NS  DBRU.BR.NS.ELS-GMS.ATT.NET.
bestfoods.com.          23h30m32s IN NS  DMTU.MT.NS.ELS-GMS.ATT.NET.

;; ADDITIONAL SECTION:
wss3.na.bestfoods.com.  23h30m32s IN A  12.14.84.10
DBRU.BR.NS.ELS-GMS.ATT.NET.  1d23h19m16s IN A  199.191.128.106
DMTU.MT.NS.ELS-GMS.ATT.NET.  1d19h30m55s IN A  12.127.16.70

;; Total query time: 3 msec
;; FROM: sch1p312 to SERVER: default -- 127.0.0.1
;; WHEN: Thu Sep 20 16:52:49 2001
;; MSG SIZE  sent: 34  rcvd: 178


-----------------------------------------------------
dig -x 12.14.84.10

; <<>> DiG 8.3 <<>> -x 
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 4
;; QUERY SECTION:
;;      10.84.14.12.in-addr.arpa, type = ANY, class = IN

;; ANSWER SECTION:
10.84.14.12.in-addr.arpa.  22h39m53s IN CNAME
10.0/26.84.14.12.in-addr.arpa.

;; AUTHORITY SECTION:
14.12.in-addr.arpa.     22h39m53s IN NS  cmtu.mt.ns.els-gms.att.net.
14.12.in-addr.arpa.     22h39m53s IN NS  dmtu.mt.ns.els-gms.att.net.
14.12.in-addr.arpa.     22h39m53s IN NS  cbru.br.ns.els-gms.att.net.
14.12.in-addr.arpa.     22h39m53s IN NS  dbru.br.ns.els-gms.att.net.

;; ADDITIONAL SECTION:
cmtu.mt.ns.els-gms.att.net.  1d23h35m52s IN A  12.127.16.69
dmtu.mt.ns.els-gms.att.net.  1d19h30m23s IN A  12.127.16.70
cbru.br.ns.els-gms.att.net.  1d23h35m52s IN A  199.191.128.105
dbru.br.ns.els-gms.att.net.  1d23h18m44s IN A  199.191.128.106

;; Total query time: 4 msec
;; FROM: sch1p312 to SERVER: default -- 127.0.0.1
;; WHEN: Thu Sep 20 16:53:21 2001
;; MSG SIZE  sent: 42  rcvd: 249

Matthew Boex
Sendmail Group
312.822.3955