spf.emailsignatures365.com has no SRV records.
Question and response
Question
dig spf.emailsignatures365.com. SRV
Answer
The response has no answer records.
Authority
emailsignatures365.com. 180 SOA ns0.dnsmadeeasy.com. dns.dnsmadeeasy.com. 2008010405 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0