listserver.trexler.at has no MX records.
Question and response
Question
dig listserver.trexler.at. MX
Answer
The response has no answer records.
Authority
trexler.at. 3600 SOA ns.trexler.at. hostmaster.trexler.at. 2025122807 3600 1800 604800 172800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0