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qmail-queue - queue a mail message for delivery
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
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).
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.
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
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.
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
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
73 Connection to mail server rejected. (Not used by
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.
addresses(5), envelopes(5), qmail-header(5), qmail-
inject(8), qmail-qmqpc(8), qmail-send(8), qmail-smtpd(8)
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