mail.swat.coop has no MX records.
Question and response
Question
dig mail.swat.coop. MX
Answer
The response has no answer records.
Authority
swat.coop. 300 SOA ns1.swatco.com. noc.swat.coop. 2025080404 900 600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0