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What is a DNS A record?

Learn all about what a DNS A record is.

What is a DNS A record and how does it apply to mailing or email systems and software?

An A record is that which holds an IP address (or addresses) related to a particular domain. If there is no MX record for a domain, e-mail will be delivered according to the A record.

For more information on this topic, visit these other SearchSecurity resources:
Best Web Links: DNS server security: Learning from Microsoft's mistakes
News: DNS security upgrade promises a safer 'Net

This was first published in August 2001

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