qmail-queue(8)

NAME
qmail-queue - queue a mail message for delivery

SYNOPSIS
qmail-queue

DESCRIPTION
qmail-queue reads a mail message from descriptor 0. It then reads envelope information from descriptor 1. It places the message into the outgoing queue for future delivery by qmail-send. The envelope information is an envelope sender address followed by a list of envelope recipient addresses. The sender address is preceded by the letter F and terminated by a 0 byte. Each recipient address is preceded by the letter T and terminated by a 0 byte. The list of recipient addresses is terminated by an extra 0 byte. If qmail-queue sees end-of-file before the extra 0 byte, it aborts without placing the message into the queue. Every envelope recipient address should contain a username, an @ sign, and a fully qualified domain name. qmail-queue always adds a Received line to the top of the message. Other than this, qmail-queue does not inspect the message and does not enforce any restrictions on its contents. However, the recipients probably expect to see a proper header, as described in qmail-header(5). Programs included with qmail which invoke qmail-queue will invoke the contents of $QMAILQUEUE instead, if that environment variable is set.

FILESYSTEM RESTRICTIONS
qmail-queue imposes two constraints on the queue structure: each mess subdirectory must be in the same filesystem as the pid directory; and each todo subdirectory must be in the same filesystem as the intd directory.

EXIT CODES
qmail-queue does not print diagnostics. It exits 0 if it has successfully queued the message. It exits between 1 and 99 if it has failed to queue the message. All qmail-queue error codes between 11 and 40 indicate permanent errors:

11  Address too long.

31  Mail server permanently refuses to send the message to any recipients. (Not used by qmail-queue, but can be used by programs offering the same interface.)

All other qmail-queue error codes indicate temporary errors:

51  Out of memory.

52  Timeout.

53  Write error; e.g., disk full.

54  Unable to read the message or envelope.

55  Unable to read a configuration file. (Not used by qmail-queue.)

56  Problem making a network connection from this host. (Not used by qmail-queue.)

61  Problem with the qmail home directory.

62  Problem with the queue directory.

63  Problem with queue/pid.

64  Problem with queue/mess.

65  Problem with queue/intd.

66  Problem with queue/todo.

71  Mail server temporarily refuses to send the message to any recipients. (Not used by qmail-queue.)

72  Connection to mail server timed out. (Not used by qmail-queue.)

73  Connection to mail server rejected. (Not used by qmail-queue.)

74  Connection to mail server succeeded, but communication failed. (Not used by qmail-queue.)

81  Internal bug; e.g., segmentation fault.

91  Envelope format error.

SEE ALSO
addresses(5), envelopes(5), qmail-header(5), qmail-inject(8), qmail-qmqpc(8), qmail-send(8), qmail-smtpd(8)