sir.red.sv has no MX records.
Question and response
Question
dig sir.red.sv. MX
Answer
The response has no answer records.
Authority
sv. 43200 SOA sir.red.sv. lito.ibarra.sv. 2026022501 43200 3600 2592000 43200
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0