qualityhosting.de.spf.hornetdmarc.com has no SRV records.
Question and response
Question
dig qualityhosting.de.spf.hornetdmarc.com. SRV
Answer
The response has no answer records.
Authority
spf.hornetdmarc.com. 1800 SOA cass.ns.cloudflare.com. dns.cloudflare.com. 2398275852 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0