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Postfix: The Definitive Guide by Kyle D. Dent

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Name

qmqpd_error_delay

Possible values:

time unit

Default:

1s

The QMQP service provides a centralized mail queue for a cluster of mail hosts. The qmqpd_error_delay specifies the length of time the QMQP server should pause before sending a negative reply to a client. The delay is meant to slow down misbehaving clients.

Example:

qmqpd_error_delay = 1s

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