Secondary Mail Server entry

[Dragon Rider]

I'm having problems with this DNS table. It's setup to use 209.193.198.226
as the primary e-mail. But if that mail server isnt available, I want it to
use mail.wyvernweb.com.. am I doing everything correctly here?

; BIND version named 8.2.2-P3 Thu Nov 11 00:04:50 EST 1999
; BIND version
root at porky.devel.redhat.com:/usr/src/bs/BUILD/bind-8.2.2_P3/src/bin/named
; zone 'radioamerica.org'   last serial 1999113001
; from 216.50.23.2:53 (local 216.50.23.10) using AXFR at Tue Mar 28 14:42:13
2000
$ORIGIN org.
radioamerica    3600    IN      SOA     ns.wyvernweb.com.
crogers.wyvernweb.com. (
                2000032801 3600 1800 180000 3600 )
        3600    IN      NS      ns.wyvernweb.com.
        3600    IN      NS      imp.wyvernweb.com.
        3600    IN      MX      100 209.193.198.226.
        3600    IN      MX      200 mail.wyvernweb.com.
        3600    IN      A       216.50.23.112
$ORIGIN radioamerica.org.
mail    3600    IN      A       209.193.198.226
www   3600    IN      A       216.50.23.112