MimeParserMboxMarker Property

public string MboxMarker { get; }

public static void ParseMbox (string fileName)
{
    // Load every message from a Unix mbox spool.
    using (var stream = fileName.OpenRead (fileName)) {
        var parser = new MimeParser (stream, MimeFormat.Mbox);

        while (!parser.IsEndOfStream) {
            MimeMessage message = parser.ParseMessage ();
            long mboxMarkerOffset = parser.MboxMarkerOffset;
            string mboxMarker = parser.MboxMarker;

            Console.WriteLine ($"MBOX marker found @ {mboxMarkerOffset}: {mboxMarker}");

            // TODO: Do something with the message.
        }
    }
}