spf.computerfarm.ch has no MX records.
Question and response
Question
dig spf.computerfarm.ch. MX
Answer
The response has no answer records.
Authority
computerfarm.ch. 10800 SOA postino.computerfarm.ch. postmaster.computerfarm.ch. 2026012601 10800 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0