Nice command to check MX record from command line:
[code language=”bash”] cat /var/named/yoursite.com.ar.db | grep MX [/code]
And see:
yoursite.com.ar. 14400 IN MX 20 ALT1.ASPMX.L.GOOGLE.COM.
yoursite.com.ar. 14400 IN MX 30 ALT2.ASPMX.L.GOOGLE.COM.
yoursite.com.ar. 14400 IN MX 40 ALT3.ASPMX.L.GOOGLE.COM.
yoursite.com.ar. 14400 IN MX 50 ALT4.ASPMX.L.GOOGLE.COM.
yoursite.com.ar. 14400 IN MX 10 ASPMX.L.GOOGLE.COM.