mailout2.gconnect.net has no MX records.
Question and response
Question
dig mailout2.gconnect.net. MX
Answer
The response has no answer records.
Authority
gconnect.net. 900 SOA ns0.gconnect.net. dnsmaster.gconnect.net. 2025090901 7200 7200 1209600 7200
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0