mail10.fcmicro.net has no MX records.
Question and response
Question
dig mail10.fcmicro.net. MX
Answer
The response has no answer records.
Authority
fcmicro.net. 3600 SOA dns1.namebay.com. admin.validname.com. 2026021610 10800 600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0