exim_msgdate - Utility to convert an exim message-id to a human readable date+time

exim_msgdate is a tool which converts an exim message-id to a human readable form, usuall just the
       date+time, but with the --pid option the process id as well.

       Three exim message ID formats are recognized.  In each case the 'X's are taken from the base (see below)
       which depends upon the platform.

       XXXXXX-XXXXXX-XX
           found in the exim logfile,

       EXXXXXX-XXXXXX-XX
           found in the Message-Id header,

       XXXXXX
           just the first six characters of the message id.

         exim_msgdate -  Utility to convert an exim message-id to a human readable date+time

TimeZonesandUnixTime-u|--unix
           Display time as seconds since 1 Jan 1970, the Unix Epoch.

       --GMT-u|--UTC-z|--zulu
           Display time in GMT/UTC - we assume these are the same.  Zulu time is another name for GMT.

       -l|--local
           Display time in the local time-zone.

           Do not confuse this with the --localhost_number option.

       The default is the local timezone.

   UserAssistanceOptions--help
           A brief list of the options

       --man
           A more detailed manual for exim_msgdate--debug
           Information about what went wrong, mostly for developers.

   SpecializedOptions--base n | --base36 | --base62
           The  message-id  is usually encoded in base-62 (0-9A-Za-z), but on systems with case-insensitive file
           systems, such as MacOS and Cygwin, base-36 (0-9A-Z) is used instead.  The installation script  should
           have set the default appropriately, but these options allow the default base to be overridden.

           The default matches "exim"; in this installation it is base-62.

       --pid
           Report the process id as well as the date and time in the message-id.

       --localhost_number n
           If  the  Exim  configuration option localhost_number has been set, the third and final section of the
           message-id will include this and the timer resolution will change (see the Exim Spec.  for  details).
           "Exim_msgdate" reads the Exim config file (see --C) to find this value, but it can be overridden with
           this option.

           The  value  is  an  integer  between  0  and  16,  or  the  value  "none"  which  means  there  is no
           localhost_number.

           Do not confuse this with the --local option, which displays times in the local timezone.

       --Cfullpathtoeximconfigurationfile
           This overrides the usual exim search path.  We set "localhost_number" from the exim configfile.

       -dexim_path
           The test harness passes the full path of the "exim" binary, or here the "exim_msgdate" being  tested.
           Not currently used.

exim(8)

       Exim       spec.txt       chapter       4      <https://exim.org/exim-html-current/doc/html/spec_html/ch-
       how_exim_receives_and_delivers_mail.html#SECTmessiden>

perl v5.40.1                                       2025-06-12                                    EXIM_MSGDATE(8)

exim_msgdate [ -u|--unix | --GMT | --z|-Zulu | --UTC | -l|--local ]
             [ --base 36 | --base 62 | --base36 | --base62 | --b36 | --b62 ]
             [ --pid ] [ --debug ] [ --localhost_number ]
             [ -c c<full path to exim cnfig file> ]
             exim-message-id [ | exim-message-id ...]

       exim_msgdate --help|--man