spf2.reedelsevier.com has no CNAME records.
Question and response
Question
dig spf2.reedelsevier.com. NS
Answer
The response has no answer records.
Authority
reedelsevier.com. 425 SOA spn5061.telecom.regn.net. hostmaster.lexisnexis.com. 2800 3600 900 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0