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Last update: 2022-08-26

Sequence of Sender Checks

Find out how the different sender checks are processed in Sophos Email Security.

Three of the individual checks that Sender Checks uses are SPF, DKIM, and DMARC. The order in which they are carried out depends on the check, and the settings in your email security policies.

Sender Checks flow chart

The following flow chart shows the order in which these checks are carried out in different scenarios, and what happens when each check passes or fails.

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Sender Checks flow chart

Sender Checks truth table

The following truth table shows you the actions taken for every combination of policy setting and check result.

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Sender Checks truth table