vtms01.swissvoiptel.ch has no MX records.
Question and response
Question
dig vtms01.swissvoiptel.ch. MX
Answer
The response has no answer records.
Authority
swissvoiptel.ch. 3600 SOA vtns01.swissvoiptel.ch. hostmaster.swissvoiptel.ch. 2026030501 28800 7200 2419200 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0