MX (Mail Exchange) records in DNS define the mail servers responsible for receiving email for a domain. Each MX record has a priority value.
Important concept:
A lower number indicates a higher priority.
Email servers attempt delivery to the mail server with the lowest priority first.
For example:
If MX records are:
10 mail1.example.com
20 mail2.example.com
Then mail1 will be tried first. If it fails, mail2 will be used.
So the statement “MX record priority increases as the number increases” is false.
[Reference:CEH v13 Study Guide – Module 3: DNS Records → MX Record Priority ExplanationRFC 974 – Mail Routing and the Domain System, ==================================================================, ]
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