Provided by: nmh_1.6-8build1_amd64 
NAME
msgchk - check for messages
SYNOPSIS
msgchk [-date | -nodate] [-notify all/mail/nomail ] [-nonotify all/mail/nomail ] [-host hostname] [-user
username] [-sasl] [-saslmech mechanism] [-snoop] [users ... ] [-version] [-help]
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 maildrop. 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 maildrops. The -nonotify type switch
has the inverted sense, so -nonotify all directs msgchk to never report the status of maildrops. 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 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, 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, 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.
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)
DEFAULTS
`user' defaults to the current user
`-date'
`-notify all'
CONTEXT
None