mx1.exclusivehosting.net has no SRV records.
Question and response
Question
dig mx1.exclusivehosting.net. SRV
Answer
The response has no answer records.
Authority
mx1.exclusivehosting.net. 1800 SOA mx2.exclusivehosting.net. root.exclusivehosting.net. 1479143363 28800 7200 604800 86400
Additional
. 0 OPT ; payload 600, xrcode 0, version 0, flags 0