.\" 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. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. 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 .\" $Id: mail.local.8,v 1.13 1998/08/15 21:04:33 millert Exp $ .\" .Dd April 27, 1991 .Dt MAIL.LOCAL 8 .Os .Sh NAME .Nm mail.local .Nd store mail in a mailbox .Sh SYNOPSIS .Nm mail.local .Op Fl L .Op Fl l .Op Fl f Ar from .Ar user ... .Sh DESCRIPTION .Nm Mail.local 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 xxxxxxx .It Fl f Ar from Specify the sender's name. .It Fl l For compatibility, request that files named .Nm username.lock be used for locking. (This is the default behavior.) .It Fl L Request that .Fn flock be used for locking the mail spool rather than .Nm username.lock . .El .Pp Individual mail messages in the mailbox are delimited by an empty line followed by a line beginning with the string ``From ''. A line containing the string ``From '', the sender's name and a time stamp is prepended to each delivered mail message. A blank line is appended to each message. A greater-than character (``>'') is prepended to any line in the message which could be mistaken for a ``From '' delimiter line. .Pp Significant efforts have been made to ensure that .Nm mail.local 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 all styles of locking. The use of 1777 is more flexible in an NFS shared-spool environment, thus 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 By default, mailbox locking is done with .Nm username.lock files. However, if the .Fl L flag is specified, the mailbox is exclusively locked with .Xr flock 2 while mail is appended. .Pp If the ``biff'' service is returned by .Xr getservbyname 3 , the biff server is notified of delivered mail. .Pp The .Nm mail.local utility exits 0 on success, and >0 if an error occurs. .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 HISTORY A superset of .Nm mail.local (handling mailbox reading as well as mail delivery) appeared in .At v7 as the program .Nm mail . .Sh BUGS Since .Xr sendmail 8 bases its idea of whether a message has been delivered or not on the return value from .Nm mail.local , using quotas in .Pa /var/mail can be problematic. By default, .Xr sendmail 8 will ask .Nm mail.local 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 mail.local 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. .br If you are running with 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/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: .Dl define(`LOCAL_MAILER_FLAGS', `rn9')dnl to your .Dq \.mc file (this is the source file that is used to generate .Pa /etc/sendmail.cf ) . .Sh SEE ALSO .Xr biff 1 , .Xr mail 1 , .Xr xsend 1 , .Xr flock 2 , .Xr getservbyname 3 , .Xr comsat 8 , .Xr sendmail 8