m00.mein-mailsystem.de has no MX records.
Question and response
Question
dig m00.mein-mailsystem.de. MX
Answer
The response has no answer records.
Authority
mein-mailsystem.de. 3600 SOA ns1.mein-webdienst.de. hostmaster.fisinger-hosting.eu. 2025091101 10800 3600 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0