Error the server quit without updating pid file
Unnecessary changes are likely to impair the operation of the mail system.
A cleanup run is logged as "partial" when the daemon terminates early after "postfix reload", "postfix stop", or no requests for $max_idle seconds.
This is the default with Postfix version 2.6 and earlier.
Specify a location in a file system that will not fill up.
Default values are shown after the parameter name in parentheses, and can be looked up with the "postconf -d" command.
Note: this is not an invitation to make changes to Postfix configuration parameters.
This form is supported with Postfix versions ≥ 3.0.