ts1-ext.sct.de has no MX records.
Question and response
Question
dig ts1-ext.sct.de. MX
Answer
The response has no answer records.
Authority
sct.de. 28800 SOA ts1.sct.de. st.sct.de. 2026012900 14400 3600 2419200 28800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0