nycsubway.jpj.net has no MX records.
Question and response
Question
dig www.mta.nyc.ny.us. MX
Answer
The response has no answer records.
Authority
nyc.ny.us. 86400 SOA ns1.localitymanagement.us. locality-support.about.us. 2025062520 86400 86400 86400 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0