_:n29aa153e314243d4bed9ac72351d79f1xb1
<http://schema.org/text>
"* Open a CMD prompt\n* Type NSLOOKUP\n> set q=mx\n> theirdomain.com\n   Response:\n   Non-authoritative answer:                                                      \n   theirdomain.com   MX preference = 50, mail exchanger = mail.theirdomain.com     \n   "
<https://frontend.spiceworks.com/how_to/11-test-email-flow-using-smtp-commands?from_group=240>