{ "mode": "man", "parameter": "msgchk", "section": "1", "url": "https://www.chedong.com/phpMan.php/man/msgchk/1/json", "generated": "2026-11-12T10:20:28Z", "synopsis": "msgchk [-help] [-version] [-date | -nodate] [-notify all/mail/nomail ] [-nonotify\nall/mail/nomail ] [-host hostname] [-port portname/number] [-user username] [-sasl |\n-nosasl] [-saslmech mechanism] [-tls] [-initialtls] [-notls] [-certverify | -nocertver‐\nify] [-authservice service] [-snoop] [users ... ]", "sections": { "NAME": { "content": "msgchk - nmh's check for incoming email\n", "subsections": [] }, "SYNOPSIS": { "content": "msgchk [-help] [-version] [-date | -nodate] [-notify all/mail/nomail ] [-nonotify\nall/mail/nomail ] [-host hostname] [-port portname/number] [-user username] [-sasl |\n-nosasl] [-saslmech mechanism] [-tls] [-initialtls] [-notls] [-certverify | -nocertver‐\nify] [-authservice service] [-snoop] [users ... ]\n", "subsections": [] }, "DESCRIPTION": { "content": "The msgchk program checks all known mail drops for mail waiting for you. For those drops\nwhich have mail for you, msgchk will indicate if it believes that you have seen the mail in\nquestion before.\n\nThe -notify type switch indicates under what circumstances msgchk should produce a message.\nThe default is -notify all which says that msgchk should always report the status of the\nusers mail drop. Other values for `type' include `mail' which says that msgchk should report\nthe status of waiting mail; and, `nomail' which says that msgchk should report the status of\nempty mail drops. The -nonotify type switch has the inverted sense, so -nonotify all directs\nmsgchk to never report the status of mail drops. This is useful if the user wishes to check\nmsgchk's exit status. A non-zero exit status indicates that mail was not waiting for at\nleast one of the indicated users.\n\nIf msgchk produces output, then the -date switch directs msgchk to print out the last date\nmail was read, if this can be determined.\n", "subsections": [ { "name": "Using POP", "content": "msgchk will normally check all the local mail drops, but if the option “pophost:” is set in\nthe mts configuration file “mts.conf”, or if the -host hostname switch is given, msgchk will\nquery this POP service host as to the status of mail waiting. The -port switch specifies the\nport name or number used to connect to the POP server. If unspecified, the default is\n“pop3”.\n\nTo specify a username for authentication with the POP server, use the -user username switch.\nThe credentials profile entry in mh-profile(5) describes the ways to supply a username and\npassword.\n\nFor debugging purposes, there is also a switch -snoop, which will allow you to watch the POP\ntransaction take place between you and the POP server. If -sasl -saslmech xoauth2 is used,\nthe HTTP transaction is also shown.\n\nIf nmh has been compiled with SASL support, the -sasl switch will enable the use of SASL au‐\nthentication. Depending on the SASL mechanism used, this may require an additional password\nprompt from the user (but the netrc file can be used to store this password, as described in\nmh-profile(5). The -saslmech switch can be used to select a particular SASL mechanism.\n\nIf SASL authentication is successful, msgchk will attempt to negotiate a security layer for\nsession encryption. Encrypted traffic is labelled with `(encrypted)' and `(decrypted)' when\nviewing the POP transaction with the -snoop switch; see post(8)'s description of -snoop for\nits other features.\n\nIf nmh has been compiled with OAuth support, the -sasl -saslmech xoauth2 switch will enable\nOAuth authentication. The -user switch must be used, and the user-name must be an email ad‐\ndress the user has for the service, which must be specified with the -authservice service\nswitch. Before using this, the user must authorize nmh by running mhlogin and grant autho‐\nrization to that account. See mhlogin(1) for more details.\n\nIf nmh has been compiled with TLS support, the -tls and -initialtls switches will require the\nnegotiation of TLS when connecting to the remote POP server. The -tls switch will negotiate\nTLS as part of the normal POP protocol using the STLS command. The -initialtls switch will\nnegotiate TLS immediately after the connection has taken place, before any POP commands are\nsent or received. Data encrypted by TLS is labeled `(tls-encrypted)' and `(tls-decrypted)'\nwith viewing the POP transaction with the -snoop switch. The -notls switch will disable all\nattempts to negotiate TLS.\n\nWhen using TLS the default is to verify the remote certificate and SubjectName against the\nlocal trusted certificate store. This can be controlled by the -certverify and -nocertverify\nswitches. See your OpenSSL documentation for more information on certificate verification.\n" } ] }, "FILES": { "content": "$HOME/.mhprofile The user profile\n/etc/nmh/mts.conf nmh mts configuration file\n/var/mail/$USER Location of mail drop\n", "subsections": [] }, "PROFILE COMPONENTS": { "content": "None\n", "subsections": [] }, "SEE ALSO": { "content": "inc(1), mh-mail(5), post(8)\n", "subsections": [] }, "DEFAULTS": { "content": "`user' defaults to the current user\n`-date'\n`-notify all'\n", "subsections": [] }, "CONTEXT": { "content": "None\n\nnmh-1.8 2016-11-02 MSGCHK(1mh)", "subsections": [] } }, "summary": "msgchk - nmh's check for incoming email", "flags": [], "examples": [], "see_also": [ { "name": "inc", "section": "1", "url": "https://www.chedong.com/phpMan.php/man/inc/1/json" }, { "name": "mh-mail", "section": "5", "url": "https://www.chedong.com/phpMan.php/man/mh-mail/5/json" }, { "name": "post", "section": "8", "url": "https://www.chedong.com/phpMan.php/man/post/8/json" } ] }