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       inc - incorporate new mail


       inc [+folder] [-audit audit-file] [-noaudit] [-changecur |
            -nochangecur] [-form formfile] [-format string] [-file name]
            [-silent | -nosilent] [-truncate | -notruncate] [-width columns]
            [-host hostname] [-user username] [-pack file] [-nopack] [-proxy
            command] [-apop | -noapop] [-kpop] [-sasl] [-saslmech mechanism]
            [-snoop] [-version] [-help]


       Inc incorporates mail from the user’s incoming mail drop  into  an  nmh

       You  may  specify  which  folder  to use with +folder.  If no folder is
       specified, then inc will use either the folder given by  a  (non-empty)
       “Inbox”  entry  in the user’s profile, or the folder named “inbox”.  If
       the specified (or default) folder  doesn’t  exist,  the  user  will  be
       queried prior to its creation.

       When  the  new  messages  are  incorporated  into  the folder, they are
       assigned numbers starting with the next highest number for the  folder.
       As  the  messages  are  processed,  a  scan  listing of the new mail is

       If the user’s profile contains a “Msg-Protect: nnn” entry, it  will  be
       used as the protection on the newly created messages, otherwise the nmh
       default of 0644 will be used.  For all subsequent operations  on  these
       messages, this initially assigned protection will be preserved.

       If  the  switch  -audit  audit-file  is specified (usually as a default
       switch in the profile), then inc will append a header line and  a  line
       per message to the end of the specified audit-file with the format:

            inc date
            <scan line for first message>
            <scan line for second message>

       This is useful for keeping track of volume and source of incoming mail.
       Eventually, repl, forw, comp, and dist may also produce audits to  this
       (or  another)  file,  perhaps  with “Message-Id” information to keep an
       exact correspondence history.  “Audit-file” will be in the  user’s  nmh
       directory unless a full path is specified.

       Inc will incorporate even improperly formatted messages into the user’s
       nmh folder, inserting a blank line prior to the offending component and
       printing a comment identifying the bad message.

       In  all  cases,  the  user’s  mail  drop  will  be  zeroed,  unless the
       -notruncate switch is given.

       If the profile entry “Unseen-Sequence” is present and  non-empty,  then
       inc  will  add each of the newly incorporated messages to each sequence
       named by the profile entry.  Inc will not zero each sequence  prior  to
       adding messages.

       The  interpretation of the -form formatfile, -format string, and -width
       columns switches is the same as in scan.

       By using the -file name switch,  one  can  direct  inc  to  incorporate
       messages  from  a  file  other than the user’s maildrop.  Note that the
       name file will NOT be zeroed, unless the -truncate switch is given.

       If the environment variable $MAILDROP is set, then inc uses it  as  the
       location  of the user’s maildrop instead of the default (the -file name
       switch still overrides this, however).  If this environment variable is
       not  set,  then  inc will consult the profile entry “MailDrop” for this
       information.   If  the  value  found  is  not  absolute,  then  it   is
       interpreted  relative to the user’s nmh directory.  If the value is not
       found, then inc will look in  the  standard  system  location  for  the
       user’s maildrop.

       The -silent switch directs inc to be quiet and not ask any questions at
       all.  This is useful for putting inc in the background and going on  to
       other things.

   Using POP
       inc  will  normally  check local mail drops for mail, as covered above.
       But if the option “pophost” is set  in  “mts.conf”,  or  if  the  -host
       hostname  switch  is given, or if the $MAILHOST environment variable is
       set, then inc will query this POP service host for mail to incorporate.
       If  $MAILHOST  is  set  and -host is specified as well, the commandline
       switch will override the environment variable.

       The default is for inc to assume that your  account  name  on  the  POP
       server  is  the  same as your current username.  To specify a different
       username, use the -user username switch.

       When using POP, you will normally need to type the  password  for  your
       account  on  the POP server, in order to retrieve your messages.  It is
       possible  to  automate  this  process  by  creating  a  “.netrc”   file
       containing  your  login  account  information for this POP server.  For
       each POP server, this file should have a line of  the  following  form.
       Replace  the  words  mypopserver, mylogin, and mypassword with your own
       account information.

            machine mypopserver login mylogin password mypassword

       This “.netrc” file should be owned and readable only by you.

       If passed the -proxy command switch, inc will use the specified command
       to  establish  the  connection  to the POP server. The string %h in the
       command will be substituted by the hostname to connect to.

       If inc uses POP, then the -pack file switch is  considered.  If  given,
       then  inc simply uses the POP to packf the user’s maildrop from the POP
       service host to the named file.  This  switch  is  provided  for  those
       users who prefer to use msh to read their maildrops.

       For  debugging  purposes,  you  may  give the switch -snoop, which will
       allow you to watch the POP transaction take place between you  and  the
       POP server.

       If nmh has been compiled with APOP support, the -apop switch will cause
       inc to use APOP rather than standard POP3 authentication.  Under  APOP,
       a  unique string (generally of the format <pid.timestamp@hostname> ) is
       announced by the POP server.  Rather than ‘USER user’, ‘PASS password’,
       inc  sends  ‘APOP  user  digest’,  where  digest is the MD5 hash of the
       unique string followed by a  ‘secret’  shared  by  client  and  server,
       essentially  equivalent  to the user’s password (though an APOP-enabled
       POP3 server could have separate APOP and plain  POP3  passwords  for  a
       single  user).   -noapop disables APOP in cases where it’d otherwise be

       If nmh has been compiled with KPOP support, the -kpop switch will allow
       inc  to  use  Kerberized  POP  rather  than  standard  POP3  on a given
       invocation.  If POPSERVICE was also #defined to  "kpop",  inc  will  be
       hardwired to always use KPOP.

       If  nmh  has  been  compiled  with  SASL support, the -sasl switch will
       enable the use of SASL authentication.  Depending on the SASL mechanism
       used, this may require an additional password prompt from the user (but
       the “.netrc” file can be used to store this password).   The  -saslmech
       switch can be used to select a particular SASL mechanism.

       If  SASL  authentication is successful, inc will attempt to negotiate a
       security layer for session encryption.  Encrypted traffic  is  labelled
       with  ‘(encrypted)’  and ‘(decrypted)’ when viewing the POP transaction
       with the -snoop switch.


       $HOME/.mh_profile          The user profile
       /etc/nmh/mts.conf          nmh mts configuration file
       /var/mail/$USER            Location of mail drop


       Path:                To determine the user’s nmh directory
       Alternate-Mailboxes: To determine the user’s mailboxes
       Inbox:               To determine the inbox, default “inbox”
       Folder-Protect:      To set mode when creating a new folder
       Msg-Protect:         To set mode when creating a new message and audit-file
       Unseen-Sequence:     To name sequences denoting unseen messages


       mhmail(1), scan(1), mh-mail(5), post(8)


+folder’ defaulted by “Inbox” above
       ‘-format’ defaulted as described above
       ‘-truncate’ if ‘-file name’ not given, ‘-notruncate’ otherwise
       ‘-width’ defaulted to the width of the terminal


       The folder into which messages are being incorporated will  become  the
       current folder.  The first message incorporated will become the current
       message, unless the -nochangecur option is specified.  This leaves  the
       context ready for a show of the first new message.


       The  argument  to  the  -format  switch must be interpreted as a single
       token by the shell that invokes inc.  Therefore, one must usually place
       the argument to this switch inside double-quotes.