Simon Loewen writes:
# dnsqr a dnsexit.com 1 dnsexit.com: 45 bytes, 1+1+0+0 records, response, noerror query: 1 dnsexit.com answer: dnsexit.com 600 A 67.214.175.75 # dnsmx dnsexit.com 1 mail.dnsexit.com 2 mail2.dnsexit.com Unforntunatly textmxlookup fails. # testmxlookup dnsexit.com Soft error.
testmxlookup doesn't do just an A lookup, it does an MX lookup first, and then, depending on the response, may try additional A and/or AAAA lookups on the resulting hostnames.
testmxlookup's far more sensitive to DNS hiccups than a single dig.
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