mail.seagil.com has no MX records.
Question and response
Question
dig mail.seagil.com. MX
Answer
The response has no answer records.
Authority
seagil.com. 300 SOA ns.rackspace.com. hostmaster.rackspace.com. 1770928012 10800 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0