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VACATION(1)							   VACATION(1)

NAME    [Toc]    [Back]

     vacation -	return ``I am not here'' mail indication

SYNOPSIS    [Toc]    [Back]

     Initializing the database:

     vacation -i [ -r interval ]

     Replying to mail:

     vacation [	-a alias ] userid

DESCRIPTION    [Toc]    [Back]

     Vacation automatically returns a message to anyone	who sends you mail.
     Typically,	this message informs the sender	that you are not available to
     read your mail.

   Initializing	the Database
     When called with the -i flag, vacation initializes	the ndbm(3B) database
     files .vacation.pag and .vacation.dir in your home	directory.  If a
     vacation database already exists, vacation	will delete the	old one	and
     create a new (empty) one.	vacation uses this database to keep track of
     the people	to whom	it has sent messages and at what times such messages
     were sent.	 vacation requires this	information to implement the reply
     interval function described below.

     The -r flag causes	vacation to set	the reply interval to interval days.
     The reply interval	is the time the	system will wait before	sending	a
     duplicate notification message to the same	user.  For example, if the
     reply interval is set to 3	days, then no matter how frequently a given
     user sends	you mail, he will be sent a notification message at most once
     every 3 days.  This feature reduces unnecessary mail traffic for the
     system and	undue irritation for those who send you	mail.

     An	interval of ``0'' means	that a reply is	sent to	each message, and an
     interval of ``infinite'' (actually, any non-numeric character) will never
     send more than one	reply.

     The default interval is seven days.

     Caveat: An	interval of ``0'' is quite dangerous as	it allows mailers to
     get into ``I am on	vacation'' loops.

   Replying to Mail    [Toc]    [Back]
     When called without the -i	flag, vacation sends an	automatic reply
     message.  vacation	will expect to see an incoming mail message on
     standard input.  Once the message has been	collected, vacation will send
     an	automatic reply	to the sender of the incoming mail message provided
     that all of the following are true:

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VACATION(1)							   VACATION(1)

     1.	userid (or an alias supplied using the -a option) is part of either
	the ``To:'' or ``Cc:'' headers of the mail.

     2.	No automatic reply has been sent to the	sender within the configured
	interval days. (See the	-i and -r flags	above.)

     3.	The sender of the incoming message is not ``???-REQUEST'',
	``Postmaster'',	``UUCP'', ``MAILER'', or ``MAILER-DAEMON'' (where case
	doesn't	matter).

     4.	No ``Precedence: bulk''	or ``Precedence: junk''	line is	included in
	headers	of the incoming	mail message.

     The automatic reply message will be read from the .vacation.msg file in
     the home directory	associated with	userid.	This file should contain the
     complete mail message (including headers) which will be sent back to the
     sender.  If it does not include a ``Subject:'' line, vacation will
     construct one using the ``Subject:'' line from the	incoming message.

     Vacation reads the	first line from	the standard input for a UNIX-style
     ``From'' line to determine	the address of the sender.  sendmail(1M)
     includes this ``From'' line automatically.	 Note that if the incoming
     message contains a	``Reply-To:'' message header, vacation will send its
     reply message to the address listed there instead of to the address from
     the ``From'' line.

EXAMPLE    [Toc]    [Back]

     To	configure vacation so that it will automatically return	a message to
     each person who sends you mail, you will need to take the following

     1.	Create a .vacation.msg file in your home directory containing the
	message	that you want vacation to return to each sender.  It should be
	a complete message (including headers).	 If your name was ``John
	Brown,'' your userid was ``john'' and your host	name was
	``mymachine.company.com'', you might create a .vacation.msg file

	  From:	john@mymachine.company.com (John Brown)
	  Precedence: bulk

	  I am on vacation until Aug. 1st.  In my absence, please refer
	  all urgent business to Jane Smith.  Her e-mail address is

	       -- John Brown

     2.	Initialize the vacation	database in your home directory	by invoking
	vacation with the -i flag and, optionally, the -r flag.

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VACATION(1)							   VACATION(1)

     3.	Create a .forward file in your home directory that tells sendmail(1M)
	to pass	incoming mail to the vacation program.	Again, if your name
	was ``John Brown'' and your userid was ``john,'' your .forward file
	might have:

	  \john, "|/usr/sbin/vacation john"

	This will cause	sendmail(1M) to	send one copy of the incoming message
	to your	regular	mailbox	(so you	can read it when you get back) and one
	copy of	the message to the vacation program.  Note that	the vacation
	program	is called such that it will reply to any messages for

DIAGNOSTICS    [Toc]    [Back]

     Fatal errors, such	as calling vacation with incorrect arguments, or with
     non-existent userids, are logged in the system log	file, using

FILES    [Toc]    [Back]

     ~/.vacation.dir	database file
     ~/.vacation.msg	message	to send
     ~/.vacation.pag	database file

SEE ALSO    [Toc]    [Back]

     ndbm(3B), sendmail(1M), syslog(3B).

									PPPPaaaaggggeeee 3333
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