10.1 on
page 1149. The effect of those values on ordering the queue is described in ?§11.7 on page
426.
The Precedence: header should never be declared as an H line in the configuration file.
However, P precedence lines should be declared in that file.
25.12.29 Priority:
Determine timeouts in the queue sendmail
Mail messages can be placed into the queue either intentionally or because they could not
be delivered immediately. Once they are in the queue, two time periods come into play.
First is the period of time that the message should remain in the queue before a warning is
issued to the sender. Second is the total period of time that the message should remain in
the queue before it is bounced as a failed message.
Beginning withV8.7 sendmail, it is possible to tailor these intervals on the basis of three
distinct priorities of mail. The new Priority: header tells sendmail which priority a
message possesses:
Priority: pri
Here, pri can have one of three possible values: urgent, normal, and non-urgent. These
values correspond directly to the priorities specified by the Timeout.queuewarn option
This is the Title of the Book, eMatter Edition
Copyright ?© 2007 O??™Reilly & Associates, Inc. All rights reserved.
1162 | Chapter 25: The H (Headers) Configuration Command
(?§24.9.119.19 on page 1107) and Timeout.queuereturn option (?§24.
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