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Postfix: The Definitive Guide by Kyle D. Dent

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Name

smtpd_error_sleep_time

Possible values:

time unit

Default:

1s

Length of time Postfix waits initially when a client causes an error. After the number of errors exceeds the value in smtpd_soft_error_limit, Postfix increases the delay by one second for every error.

Example:

smtpd_error_sleep_time = 1s

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