phpman > man > MSGCHK(1mh)

MSGCHK(1mh)                                                                              MSGCHK(1mh)



NAME
       msgchk - nmh's check for incoming email

SYNOPSIS
       msgchk [-help] [-version] [-date | -nodate] [-notify all/mail/nomail ] [-nonotify
            all/mail/nomail ] [-host hostname] [-user username] [-sasl | -nosasl] [-saslmech mecha‐
            nism] [-initialtls] [-notls] [-certverify | -nocertverify] [-authservice service]
            [-snoop] [users ... ]

DESCRIPTION
       The msgchk program checks all known mail drops for mail waiting for  you.   For  those  drops
       which  have  mail for you, msgchk will indicate if it believes that you have seen the mail in
       question before.

       The -notify type switch indicates under what circumstances msgchk should produce  a  message.
       The  default  is  -notify  all  which says that msgchk should always report the status of the
       users mail drop.  Other values for `type' include `mail' which says that msgchk should report
       the  status of waiting mail; and, `nomail' which says that msgchk should report the status of
       empty mail drops.  The -nonotify type switch has the inverted sense, so -nonotify all directs
       msgchk  to never report the status of mail drops.  This is useful if the user wishes to check
       msgchk's exit status.  A non-zero exit status indicates that mail  was  not  waiting  for  at
       least one of the indicated users.

       If  msgchk  produces  output, then the -date switch directs msgchk to print out the last date
       mail was read, if this can be determined.

   Using POP
       msgchk will normally check all the local mail drops, but if the option “pophost:” is  set  in
       the  mts configuration file “mts.conf”, or if the -host hostname switch is given, msgchk will
       query this POP service host as to the status of mail waiting.

       To specify a username for authentication with the POP server, use the -user username  switch.
       The  credentials  profile  entry in the mh-profile(5) man page describes the ways to supply a
       username and password.

       For debugging purposes, there is also a switch -snoop, which will allow you to watch the  POP
       transaction  take  place between you and the POP server.  If -sasl -saslmech xoauth2 is used,
       the HTTP transaction is also shown.

       If nmh has been compiled with SASL support, the -sasl switch will enable the use of SASL  au‐
       thentication.   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, as described  in
       the  mh-profile(5)  man  page).  The -saslmech switch can be used to select a particular SASL
       mechanism.

       If SASL authentication is successful, msgchk 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; see the  post  man  page  description  of
       -snoop for its other features.

       If  nmh  has been compiled with OAuth support, the -sasl -saslmech xoauth2 switch will enable
       OAuth authentication.  The -user switch must be used, and the user-name must be an email  ad‐
       dress  the  user  has  for the service, which must be specified with the -authservice service
       switch.  Before using this, the user must authorize nmh by running mhlogin and  grant  autho‐
       rization to that account.  See the mhlogin man page for more details.

       If  nmh  has been compiled with TLS support, the -initialtls switch will require the negotia‐
       tion of TLS when connecting to the remote POP server.  The -initialtls switch will  negotiate
       TLS immediately after the connection has taken place, before any POP commands are sent or re‐
       ceived.  Data encrypted by TLS is labeled `(tls-encrypted)' and `(tls-decrypted)` with  view‐
       ing  the POP transaction with the -snoop switch.  The -notls switch will disable all attempts
       to negotiate TLS.

       When using TLS the default is to verify the remote certificate and  SubjectName  against  the
       local trusted certificate store.  This can be controlled by the -certverify and -nocertverify
       switches.  See your OpenSSL documentation for more information on certificate verification.

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

PROFILE COMPONENTS
       None

SEE ALSO
       inc(1), mh-mail(5) post(8)

DEFAULTS
       `user' defaults to the current user
       `-date'
       `-notify all'

CONTEXT
       None



nmh-1.7.1                                    2016-11-02                                  MSGCHK(1mh)