.TH ezmlm 5
.SH NAME
ezmlm \- format of ezmlm directory
.SH OVERVIEW
An
.B ezmlm
directory,
.IR dir ,
stores information about an
.B ezmlm
mailing list.
.B ezmlm-make
creates
.IR dir ;
.B ezmlm-sub
and
.B ezmlm-unsub
manipulate the subscriber list stored under
.IR dir ;
.B ezmlm-manage
handles administrative requests automatically;
.B ezmlm-send
sends a message to all subscribers listed in
.IR dir .
.SH SUBSCRIBERS
.I dir\fB/subscribers
is a directory containing the subscriber list.
.B ezmlm-manage
allows automatic subscription if
.I dir\fB/public
exists.

The list is hashed into 53 files, named
.B @ 
through
.B t
in ASCII.
A nonexistent file is treated as an empty file.

Each file contains a series of addresses.
An address can be any string of non-NUL characters up to 400 bytes long.
Each address is preceded by the letter T and followed by a NUL.

For reliability,
when an address is added to or removed from the mailing list,
the relevant file is recreated under a temporary name
inside
.I dir\fB/subscribers
and then moved into place.

.I dir\fB/key
is a binary file.
.B ezmlm-manage
uses
.I dir\fB/key
to create confirmation numbers.
Anyone who can guess the contents of
.I dir\fB/key
can forge subscription requests.
.B ezmlm-make
does not put much effort into making
.I dir\fB/key
difficult to guess;
for better security, you should add some random garbage to
.IR dir\fB/key .
.SH ARCHIVE
.I dir\fB/archive
is a directory containing messages previously sent to subscribers.
.B ezmlm-send
archives all new messages if
.I dir\fB/archived
exists.

Messages sent to the mailing list are numbered from 1 upwards,
whether or not they are archived.
.I dir\fB/num
is the number of messages sent so far.

.I dir\fB/archive
has subdirectories,
each subdirectory storing up to 100 messages.
Message number 100m+n, with n between 0 and 99, is stored in
.IR dir\fB/archive/\fIm\fB/\fIn .
For example, message number 15307 is stored in
.IR dir\fB/archive/153/07 .

.B ezmlm-manage
will ignore message files without the owner-execute bit set.
.B ezmlm-send
turns on the owner-execute bit after safely writing the message to disk.
.SH BOUNCES
.I dir\fB/bounce
is a directory containing bounce messages.
.B ezmlm-return
stores several types of files here.
.SH "DELIVERY INSTRUCTIONS"
.B ezmlm-make
sets up four files to control mailing list deliveries.
Each file is a series of delivery instructions in
.B dot-qmail
format.

.I dir\fB/editor
handles incoming mailing list submissions.
.B ezmlm-make
sets up
.I dir\fB/editor
to invoke
.B ezmlm-send
to immediately forward each message to all subscribers
and then to run
.BR ezmlm-warn .

.I dir\fB/owner
handles incoming messages for the mailing list's owner.
.B ezmlm-make
sets up 
.I dir\fB/owner
to store messages in
.I dir\fB/Mailbox
and then to run
.BR ezmlm-warn .

.I dir\fB/bouncer
handles incoming bounce messages.
.B ezmlm-make
sets up
.I dir\fB/bouncer
to invoke
.B ezmlm-return
and then
.BR ezmlm-warn .

.I dir\fB/manager
handles incoming administrative requests.
.B ezmlm-make
sets up
.I dir\fB/manager
to invoke
.B ezmlm-manage
and then
.BR ezmlm-warn .
.SH TEXT
.I dir\fB/text
is a directory
containing files sent out by
.B ezmlm-manage
in response to administrative requests:
.TP 15
.B top
Introducing
.BR ezmlm .
This is placed at the top of each response.
.TP
.B bottom
Explaining how to use
.BR ezmlm .
This is placed at the bottom of each response.
.TP
.B sub-confirm
Explaining how to confirm a subscription request.
.TP
.B sub-ok
Acknowledging successful subscription.
.TP
.B sub-nop
Acknowledging a subscription request for an address already
on the mailing list.
.TP
.B sub-bad
Rejecting a bad subscription confirmation number.
.TP
.B unsub-confirm
Explaining how to confirm an unsubscription request,
and explaining how to figure out the subscription address.
.TP
.B unsub-ok
Acknowledging successful unsubscription.
.TP
.B unsub-nop
Acknowledging an unsubscription request for an address not
on the mailing list.
.TP
.B unsub-bad
Rejecting a bad unsubscription confirmation number.
.TP
.B get-bad
Rejecting a bad archive retrieval request.
.TP
.B bounce-warn
Pointing out that messages have bounced.
.TP
.B bounce-probe
Pointing out that a warning message has bounced.
.TP
.B bounce-num
Explaining that
.B ezmlm-return
has kept a list of bounced message numbers.
.TP
.B bounce-bottom
Separating the bounce message.
.PP
.B ezmlm-manage
replaces the line
.B !A
in any of these files
with the name of the subscription address.
It replaces the line
.B !R
in
.B sub-confirm
and
.B unsub-confirm
with the address that the subscriber must reply to.
.SH "OUTGOING MESSAGE EDITING"
.I dir\fB/headerremove
is a list of bad header field names,
one per line.
.B ezmlm-send
removes these header fields from all outgoing messages.
.B ezmlm-make
sets up
.I dir\fB/headerremove
to remove
.BR Return-Path ,
.BR Return-Receipt-To ,
and
.B Return-Path
fields.

.I dir\fB/headeradd
is a list of new header fields.
.B ezmlm-send
adds these fields to every outgoing message.
.B ezmlm-make
sets up
.I dir\fB/headeradd
with no new fields.
.SH MISCELLANY
The first line of
.I dir\fB/mailinglist
is a line of text.
.B ezmlm-send
creates a new
.B Mailing-List
field, showing the contents of
.IR dir\fB/mailinglist ,
in every outgoing message.

The first lines of
.I dir\fB/outlocal
and
.I dir\fB/outhost
give the outgoing name of the mailing list.
These are used by
.B ezmlm-manage
and
.B ezmlm-send
to construct sender addresses for outgoing messages.

The first lines of
.I dir\fB/inlocal
and
.I dir\fB/inhost
give the incoming name of the mailing list.
These are used by
.B ezmlm-manage
to parse incoming envelopes.
Normally
.I inlocal
and
.I inhost
are the same as
.I outlocal
and
.IR outhost ,
but sometimes they are different,
with
.I outlocal\fB@\fIouthost
forwarded to
.IR inlocal\fB@\fIinhost .

If
.I dir\fB/sublist
exists,
this mailing list is a sublist,
redistributing messages from a parent mailing list.
The first line of
.I dir\fB/sublist
is the name of the parent list.
This affects the behavior of
.BR ezmlm-send .

.I dir\fB/lock
is an empty file.
Any program that reads or writes the subscriber list,
or adds messages to the archive,
locks
.IR dir\fB/lock .

.I dir\fB/Log
is an advisory log of subscription and unsubscription actions.
.B WARNING:
.B Log
is not protected against system crashes.
Log entries may be missing or corrupted if the system goes down.
.SH "SEE ALSO"
ezmlm-list(1),
ezmlm-make(1),
ezmlm-manage(1),
ezmlm-return(1),
ezmlm-send(1),
ezmlm-sub(1),
ezmlm-unsub(1),
ezmlm-warn(1),
dot-qmail(5)