# phpman > man > msgchk(1mh)

[MSGCHK(1mh)](https://www.chedong.com/phpMan.php/man/MSGCHK/1mh/markdown)                                                                              [MSGCHK(1mh)](https://www.chedong.com/phpMan.php/man/MSGCHK/1mh/markdown)



## 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)](https://www.chedong.com/phpMan.php/man/mh-profile/5/markdown) 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)](https://www.chedong.com/phpMan.php/man/mh-profile/5/markdown)  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

       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)](https://www.chedong.com/phpMan.php/man/inc/1/markdown), [_mh-mail_(5)](https://www.chedong.com/phpMan.php/man/mh-mail/5/markdown) [_post_(8)](https://www.chedong.com/phpMan.php/man/post/8/markdown)

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

## CONTEXT
       None



nmh-1.7.1                                    2016-11-02                                  [MSGCHK(1mh)](https://www.chedong.com/phpMan.php/man/MSGCHK/1mh/markdown)