mx.americaninn.net has no MX records.
Question and response
Question
dig mx.americaninn.net. MX
Answer
The response has no answer records.
Authority
americaninn.net. 3600 SOA dns.americaninn.net. hostmaster.americaninn.net. 1328517530 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0