Terminal output showing DNS lookups: $ dig +short mx netmeister.org 50 panix.netmeister.org. $ dig +short mx akamai.com 20 mx0b-00190b01.pphosted.com. 10 mxa-00190b01.gslb.pphosted.com. 10 mxb-00190b01.gslb.pphosted.com. 20 mx0a-00190b01.pphosted.com. $ dig +short mx twitter.com 30 ASPMX3.GOOGLEMAIL.com. 20 alt1.aspmx.l.google.com. 10 aspmx.l.google.com. 30 ASPMX2.GOOGLEMAIL.com. 20 alt2.aspmx.l.google.com. $ dig +short mx whynot.coffee 10 mailin.mx-hub.cz. 10 mailin.mx-hub.eu. 10 mailin.mx-hub.sk. 10 mailin.mx-hub.net.
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