<header>Timeout before sending 4xx/5xx error response</header>

<center><tt>smtpd_error_sleep_time</tt></center>
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This parameter specifies the time in seconds the SMTP server waits before
sending a <tt>4xx</tt> or <tt>5xx</tt> SMTP server error response. This
prevents naive clients from going into an error - disconnect - connect - error
loop.


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