spf.gdmnet.se has no CNAME records.
Question and response
Question
dig spf.gdmnet.se. NS
Answer
The response has no answer records.
Authority
gdmnet.se. 1296 SOA ns3.gdmnet.se. kommunikation.gdm.se. 1359720020 14400 3600 604800 38400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0