mail-out2.fuse.net has no MX records.
Question and response
Question
dig mail-out2.fuse.net. MX
Answer
The response has no answer records.
Authority
fuse.net. 900 SOA ns1.fuse.net. hostmaster.fuse.net. 3661 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0