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What is a DNS A record

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

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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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