spf2.autodiscover.info has no MX records.
Question and response
Question
dig spf2.autodiscover.info. MX
Answer
The response has no answer records.
Authority
autodiscover.info. 600 SOA ns.aname.net. hostmaster.autodiscover.info. 1684324630 10800 3600 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0