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Rhys Evans
Asked: 2013-06-26 15:52:19 +0800 CST

DNS Puzzle - No MX records but still routes email

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We have a client that the domain name has a cluster of DNS servers serving it but when it comes to mail routing... I've checked several different mx lookups including nslookup and things like who.is and mxtoolbox.com and to confirm the client showed me their DNS records and there are no MX records.

I was wondering .. how can they receiving emails if no MX specified?

The only thing I can think of is if there is a root A record pointing to (what is essentially a LAMP) server does it default back to that (at a stretch)?

domain-name-system

1 Answers

  1. Best Answer

    An A record pointing to the mail server handling the mail is enough, MX records are "optional", but preferred. So, if you have a suitable A record, this will be sufficient to deliver the mail.

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