Ubuntu Feisty 7.04 manual page repository

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Provided by: courier-mta_0.53.3-5ubuntu1_i386



        courieruucp - Sample Courier mail filter




        The  Courier  mail  server is capable of sending and receiving mail via
        UUCP.  Courier does not  implement  UUCP  directly,  but  instead  uses
        third-party UUCP software, which you must install separately. Courier’s
        UUCP support is provided automatically by the courieruucp module, which
        is compiled and installed by default.
        Courier sends mail via UUCP by issuing a request via uux to execute the
        rmail command on the remote UUCP  node.   Courier  passes  the  message
        envelope  sender  to rmail via the -f flag, and lists the message enve‐
        lope recipients as the remaining arguments. Message envelope  addresses
        and  E-mail  addresses  in the headers of the message will be appropri‐
        ately rewritten.
        Courier will only send mail via UUCP if it knows about the  recipient’s
        UUCP  node.   The  configuration  file  /etc/courier/uucpneighbors is a
        plain text configuration file.  The makeuucpneighbors  script  compiles
        this configuration file into a binary database that is read by Courier.
        Changes to /etc/courier/uucpneighbors do not take effect  until  makeu     
        ucpneighbors is executed, and Courier is restarted.
        /etc/courier/uucpneighbors  may  also  be  a  subdirectory instead of a
        plain text file, in which case the contents of all text files  in  this
        subdirectory  is  automatically  concatenated  by the makeuucpneighbors
        This configuration file must be initialized to contain  the  UUCP  node
        name    that   this   machine   is   known   to   its   neighbors.   If
        /etc/courier/uucpme does not exist, Courier uses the first node name of
        the hostname specified by the /etc/courier/me configuration file.
        Note that in addition to creating this configuration file you must also
        configure your UUCP software to appropriately route UUCP  mail  to  the
        specified  nodes,  which  is a completely separate task. Blank lines in
        this file are ignored.  Lines that start with the # character are  com‐
        ments,  and  are also ignored. The remaining lines are in the following
        node is a UUCP node, such as "apple" or "food!fruits!apple".  <TAB>  is
        a  single  tab character, and flags is zero or more of single character
        flags described below.  The tab character can be ommited if  there  are
        no flags.
        If  there  is  an  entry  for  node  in /etc/courier/uucpneighbors then
        Courier will accept mail for any address of the form  "node!user",  but
        not  "node!nodule!user". In order to accept mail for "node!nodule!user"
        you must enter both "node" and "node!nodule", unless you use the  F  or
        the G flag.
        The flags are as follows:
        F      Unrestricted  forwarding.   This  flag will accept any UUCP path
               that starts with the specified node.  Example:
               This  will  accept  "food!fruits!apple",   "food!fruits!banana",
               "food!drinks!orangejuice",  and  so  on. You may simply list all
               your immediate UUCP neighbors using the F flag, and accept  mail
               to any address that’s reachable via any neighbor.
        G      This is a gateway.  This flag is identical to the F flag, except
               that rmail is executed on the specified node.  Normally, Courier
               will  issue  a  uux  request  to run rmail on the last node, for
               example "uux food!fruits!rmail apple".  Using  G  instead  of  F
               will  run  rmail on the listed node, for example "uux food!rmail
        R      This is a relay.  This flag is used where neither F or  G  flags
               are  appropriate,  but  you  want to run rmail on this node. For
               In this example mail to "food!fruits!apple" is sent by executing
               "uux  food!rmail fruits!apple".  If the R flag is not specified,
               then Courier will request "uux food!fruits!rmail apple".
        This is the standard Courier module configuration file.
               Maximum simultaneous UUCP deliveries.  This  setting  is  a  bit
               misleading.   From Courier’s viewpoint, a delivery consists only
               of running uux to queue  up  the  message  via  UUCP.  Once  uux
               returns,  the  message  is  delivered, as far as Courier is con‐
               cerned.  UUCP is responsible for getting the message the rest of
               the way. Therefore, UUCP deliveries tend to be fairly quick, and
               it is not necessary to configure a large  number  of  concurrent
               courieruucp  processes,  since  each one will terminate quickly.
               Once uux terminates, the UUCP software is responsible for queue‐
               ing and sending the message.
               Maximum  simultaneous  UUCP  deliveries  to  the same UUCP node.
               Since UUCP deliveries tend to be fairly quick, it is not usually
               necessary  to  use MAXHOST to limit concurrent deliveries to the
               same UUCP node, so MAXHOST should generally be set to  the  same
               value as MAXDELS.
               Maximum  recipients  per message.  When the same message is sent
               to multiple recipients on the same UUCP node, Courier is capable
               of  asking to run rmail only one, and listing all the recipients
               together. MAXRCPT specifies the upper limit  on  the  number  of
               recipients  that  are  batched together. You want to set a limit
               based on any limitations on the length of command  lines  that’s
               imposed  by  the  operating  system. Sending the same message to
               different UUCP nodes is always handled as separate deliveries.
        Courier is certainly capable of relaying mail between  the  Internet  -
        via   ESMTP   -   and   UUCP-land,   rewriting  headers  and  addresses
        appropriately. The address rewriting rules are   fixed,  but  they  are
        expected  to  work  in  nearly every case. If you find yourself in some
        oddball situation, you’ll just have to invest the time  to  add  custom
        header rewriting code.
        If you are example.com, and your UUCP node is example, then <user@exam‐
        ple.com> gets rewritten as example!user.
        Internet mail may be sent via ESMTP to your UUCP neighbor apple!john by
        sending it to <apple!john@example.com>.  When that’s forwarded via UUCP
        the return address of <someone@domain.com> will be rewritten  as  exam‐
        apple!john  will get the mail with this return address, which should be
        repliable back to the sender. Courier’s UUCP module  will  receive  the
        UUCP  address  domain.com!someone,  and  translate  it  back  as <some‐


        Courier  does  not  support  defining  multiple  UUCP  node  names   in


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