3e._spf.dhl.com has no CNAME records.
Question and response
Question
dig 3e._spf.dhl.com. NS
Answer
The response has no answer records.
Authority
dhl.com. 300 SOA ns4.dhl.com. netmaster.dhl.com. 2016118552 10800 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0