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Diffstat (limited to 'contrib/libexec/mail.local/mail.local.8')
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diff --git a/contrib/libexec/mail.local/mail.local.8 b/contrib/libexec/mail.local/mail.local.8 new file mode 100644 index 00000000..330a4473 --- /dev/null +++ b/contrib/libexec/mail.local/mail.local.8 @@ -0,0 +1,183 @@ +.\" $OpenBSD: mail.local.8,v 1.31 2014/09/16 21:28:51 jmc Exp $ +.\" Copyright (c) 1990 The Regents of the University of California. +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" from: @(#)mail.local.8 6.8 (Berkeley) 4/27/91 +.\" +.Dd $Mdocdate: September 16 2014 $ +.Dt MAIL.LOCAL 8 +.Os +.Sh NAME +.Nm mail.local +.Nd store mail in a mailbox +.Sh SYNOPSIS +.Nm mail.local +.Op Fl Ll +.Op Fl f Ar from +.Ar user ... +.Sh DESCRIPTION +.Nm +reads the standard input up to an end-of-file and appends it to each +.Ar user Ns 's +.Pa mail +file. +The +.Ar user +must be a valid user name. +.Pp +The options are as follows: +.Bl -tag -width Ds +.It Fl f Ar from +Specify the sender's name. +.It Fl L +Don't create a +.Pa username.lock +file while locking the spool. +.It Fl l +For compatibility, request that files named +.Pa username.lock +be used for locking. +(This is the default behavior.) +.El +.Pp +Individual mail messages in the mailbox are delimited by an empty +line followed by a line beginning with the string +.Dq "From\&\ " . +A line containing the string +.Dq "From\&\ " , +the sender's name and a timestamp is prepended to each delivered mail message. +A blank line is appended to each message. +A greater-than character +.Pq Ql > +is prepended to any line in the message which could be mistaken for a +.Dq "From\&\ " +delimiter line. +.Pp +Significant efforts have been made to ensure that +.Nm +acts as securely as possible if the spool directory is mode 1777 or 755. +The default of mode 755 is more secure, but it prevents mail clients from using +.Pa username.lock +style locking. +The use of 1777 is more flexible in an NFS shared-spool environment, +so many sites use it. +However, it does carry some risks, such as attackers filling the spool disk. +Some of these problems may be alleviated +by making the spool a separate filesystem, and placing quotas on it. +The use of any mode other than 1777 and 755 for the spool directory is +recommended against but may work properly. +.Pp +The mailbox is always locked using +.Xr flock 2 +while mail is appended. +Unless the +.Fl L +flag is specified, a +.Pa username.lock +file is also used. +.Pp +If the +.Xr biff 1 +service is returned by +.Xr getservbyname 3 , +the biff server is notified of delivered mail. +.Sh ENVIRONMENT +.Bl -tag -width indent +.It Ev TZ +Used to set the appropriate time zone on the timestamp. +.El +.Sh FILES +.Bl -tag -width /tmp/local.XXXXXXXXXX -compact +.It Pa /tmp/local.XXXXXXXXXX +temporary files +.It Pa /var/mail/user +user's mailbox directory +.El +.Sh EXIT STATUS +.Ex -std mail.local +.Sh SEE ALSO +.Xr biff 1 , +.Xr mail 1 , +.Xr flock 2 , +.Xr getservbyname 3 , +.Xr comsat 8 , +.Xr smtpd 8 +.Sh HISTORY +A superset of +.Nm +(handling mailbox reading as well as mail delivery) appeared in +.At v7 +as the program +.Xr mail 1 . +.Sh BUGS +Using quotas in +.Pa /var/mail +can be problematic if using +.Xr sendmail 8 +as an MTA, +since it asks +.Nm +to deliver a message to multiple recipients if possible. +This causes problems in a quota environment since a message may be +delivered to some users but not others due to disk quotas. +Even though the message was delivered to some of the recipients, +.Nm +will exit with an exit code > 0, causing +.Xr sendmail 8 +to attempt redelivery later. +That means that some users will keep getting the same message every time +.Xr sendmail 8 +runs its queue. +This problem does not exist for +.Xr smtpd 8 +users. +.Pp +If you are running +.Xr sendmail 8 +and have disk quotas on +.Pa /var/mail +it is imperative that you unset the +.Dq m +mailer flag for the +.Sq local +mailer. +To do this, locate the line beginning with +.Dq Mlocal +in +.Pa /etc/mail/sendmail.cf +and remove the +.Dq m +from the flags section, denoted by +.Dq F= . +Alternately, you can override the default mailer flags by adding the line: +.Pp +.Dl define(`LOCAL_MAILER_FLAGS', `rn9S')dnl +.Pp +to your +.Dq \.mc +file (this is the source file that is used to generate +.Pa /etc/mail/sendmail.cf ) . |