VACATION(1) User Commands VACATION(1)

NAME

vacation - reply to mail automatically

SYNOPSIS

vacation [-I]


vacation [-a alias] [-e filter_file] [-f database_file]
[-j] [-m message_file] [-s sender] [-tN] username


vacation [-f database_file] -l

DESCRIPTION

The vacation utility automatically replies to incoming mail.

Installation

The installation consists of an interactive program which sets up
vacation's basic configuration.


To install vacation, type it with no arguments on the command line.
The program creates a .vacation.msg file, which contains the message
that is automatically sent to all senders when vacation is enabled,
and starts an editor for you to modify the message. (See USAGE
section.) Which editor is invoked is determined by the VISUAL or
EDITOR environment variable, or vi(1) if neither of those environment
variables are set.


A .forward file is also created if one does not exist in your home
directory. Once created, the .forward file will contain a line of the
form:


One copy of an incoming message is sent to the username and another
copy is piped into vacation:

\username, "|/usr/bin/vacation username"


If a .forward file is present in your home directory, it will ask
whether you want to remove it, which disables vacation and ends the
installation.


The program automatically creates .vacation.pag and .vacation.dir,
which contain a list of senders when vacation is enabled.

Activation and Deactivation

The presence of the .forward file determines whether or not vacation
is disabled or enabled. To disable vacation, remove the .forward
file, or move it to a new name.

Initialization

The -I option clears the vacation log files, .vacation.pag and
.vacation.dir, erasing the list of senders from a previous vacation
session. (See OPTIONS section.)

Additional Configuration

vacation provides configuration options that are not part of the
installation, these being -a, -e, -f, -j, -m, -s, and -t. (See
OPTIONS section.)

Reporting

vacation provides a reporting option, -l. See OPTIONS.

OPTIONS

The following options are supported:

-I
Initializes the .vacation.pag and .vacation.dir files and
enables vacation. If the -I flag is not specified, and a user
argument is given, vacation reads the first line from the
standard input (for a From: line, no colon). If absent, it
produces an error message.


Options -a, -e, -f, -j, -m, -s, and -t are configuration options to
be used in conjunction with vacation in the .forward file, not on the
command line. For example,

\username, "|/usr/bin/vacation -t1m username"


repeats replies to the sender every minute.

-a alias
Indicates that alias is one of the valid aliases
for the user running vacation, so that mail
addressed to that alias generates a reply.


-e filter_file
Uses filter_file instead of .vacation.filter as
the source of the domain and email address
filters.


-f database_file
Uses database_file instead of .vacation as the
base name for the database file.


-j
Does not check whether the recipient appears in
the To: or the Cc: line. Warning: use of this
option can result in vacation replies being sent
to mailing lists and other inappropriate places;
its use is therefore strongly discouraged.


-m message_file
Uses ~/message_file as the message to send for
the reply instead of ~/.vacation.msg.
message_file is a relative path to the desired
vacation message file. To prevent directory/file
"not found" errors, message_file should be on the
same disk partition as ~/.forward.


-s sender
Replies to sender instead of the value read from
the UNIX From line of the incoming message.


-tN
Changes the interval between repeat replies to
the same sender. The default is 1 week. A
trailing s, m, h, d, or w scales N to seconds,
minutes, hours, days, or weeks, respectively.


The -l option is neither for initialization nor configuration, but
for reporting. The -f option can also be used in conjunction with -l.

-l
Lists the addresses to which a reply has been sent since the
last invocation of vacation -I, along with a date and time
stamp.

USAGE

.vacation.msg should include a header with at least a Subject: line
(it should not include a To: line). For example:

Subject: I am on vacation
I am on vacation until July 22. If you have something urgent,
please contact Joe Jones (jones@fB0).
--John


If the string $SUBJECT appears in the .vacation.msg file, it is
replaced with the subject of the original message when the reply is
sent. Thus, a .vacation.msg file such as

Subject: I am on vacation
I am on vacation until July 22.
Your mail regarding "$SUBJECT" will be read when I return.
If you have something urgent, please contact
Joe Jones (jones@fB0).
--John


will include the subject of the message in the reply.


No message is sent if the To: or the Cc: line does not list the user
to whom the original message was sent or one of a number of aliases
for them, if the initial From line includes the string -REQUEST@, or
if a Precedence: bulk or Precedence: junk line is included in the
header.


vacation will also not respond to mail from either postmaster or
Mailer-Daemon.


In addition to the above criteria, if a .vacation.filter file exists,
it is used to constrain further the set of addresses to which a reply
is sent. Each line in that file should be either a domain name, an
email address, a negated domain name or a negated email address. A
negated line starts with the single character !.


Each line is compared in the order listed to the sender address. A
line containing an email address matches if the sender address is
exactly the same except for case, which is ignored. A line
containing a domain name matches if the sender address is
something@domain-name or something@something.domain-name. A reply is
sent if the first match is an entry that is not negated. If the first
match is a negated entry, or if no lines match, then no reply is
sent.


A sample filter file might look like the following:

!host.subdomain.example.com
example.com
!wife@example.org
example.org
onefriend@example.net
anotherfriend@example.net


Blank lines and lines starting with "#" are ignored.

FILES

~/.forward


~/.vacation.filter


~/.vacation.msg


A list of senders is kept in the dbm format files .vacation.pag and
.vacation.dir in your home directory. These files are dbm files and
cannot be viewed directly with text editors.

SEE ALSO

vi(1), getusershell(3C), aliases(5), shells(5), attributes(7),
sendmail(8)

November 22, 2021 VACATION(1)