ccgg.telefonica.net has no MX records.
Question and response
Question
dig ccgg.telefonica.net. MX
Answer
The response has no answer records.
Authority
ccgg.telefonica.net. 86400 SOA minerva.ttd.net. hostmaster.ttd.net. 2007030889 86400 7200 2592000 172800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0