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Time units: s (seconds), m (minutes), h (hours), d (days), w (weeks). Lookup table for persistent address verification status storage.
The table is maintained by the verify(8) service, and is opened before the process releases privileges.
This feature requires that the database supports the "delete" and "sequence" operators.
The Postfix configuration file specifies a very small subset of all the parameters that control the operation of the Postfix mail system.
Parameters not explicitly specified are left at their default values.
This form is supported with Postfix versions ≥ 3.0.
The remainder of this document is a description of all Postfix configuration parameters.
This feature is available in Postfix 2.1 and later.
The time after which a failed probe expires from the address verification cache.
These forms are supported with Postfix versions ≥ 2.2 and ≥ 3.0, respectively.
The expressions "$" and "$" are replaced with "value" when "$name" is empty.
When this feature is enabled, the cache may pollute quickly with garbage.