gtm.oss-core.net has no MX records.
Question and response
Question
dig gtm.oss-core.net. MX
Answer
The response has no answer records.
Authority
gtm.oss-core.net. 0 SOA sydcoregtm01.gtm.oss-core.net. hostmaster.sydcoregtm01.gtm.oss-core.net. 2025050802 10800 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0