HP-UX Mailing Services Administrator's Guide

Configuring and Administering Sendmail
Troubleshooting Sendmail
Chapter 2102
r – Denotes a random number
XXXXX – Denotes a 5-digit number that is the process ID of the process
creating the queue entry.
A file whose name begins with df is a data file. The message body,
excluding the header, is kept in this file.
A file whose name begins with qf is a queue-control file, which contains
the information necessary to process the job.
A file whose name begins with xf is a transcript file. This file is normally
empty while a piece of mail is in the queue. If a failure occurs, a
transcript of the failed mail transaction is generated in this file.
The queue-control file (type qf) is structured as a series of lines, each
beginning with a letter that defines the content of the line. Lines in
queue-control files are described in Table 2-6.
Table 2-6 Lines in Queue-Control Files
Initial
Letter
Content of Line
B The message body type (either 7bit or 8bitmime).
C The controlling user for message delivery. This line always precedes a
recipient line (R) that specifies the name of a file or program name.
This line contains the user name that Sendmail must run as when it
is delivering a message into a file or a program’s stdin.
D The name of the data file. There can be only one D line in the
queue-control file.
E An error address. If any such lines exist, they represent the addresses
that must receive error messages.
H A header definition. There can be many H lines in the queue-control
file. Header definitions follow the header definition syntax in the
configuration file.
P The current message priority. This is used to order the queue. Higher
numbers mean lower priorities. The priority decreases (that is, the
number grows) as the message sits in the queue. The initial priority
depends on the message precedence, the number of recipients, and
the size of the message.