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