+ "\t\tThe output is formatted with Javascript Object Notation\n"
+ "\t\t(JSON). This format is more robust than the text format\n"
+ "\t\tfor automated processing. The nested structure of multipart\n"
+ "\t\tMIME messages is reflected in nested JSON output. JSON\n"
+ "\t\toutput always includes all messages in a matching thread;\n"
+ "\t\tin effect '--format=json' implies '--entire-thread'\n"
+ "\n"
+ "\t\tmbox\n"
+ "\n"
+ "\t\tAll matching messages are output in the traditional, Unix\n"
+ "\t\tmbox format with each message being prefixed by a line\n"
+ "\t\tbeginning with 'From ' and a blank line separating each\n"
+ "\t\tmessage. Lines in the message content beginning with 'From '\n"
+ "\t\t(preceded by zero or more '>' characters) have an additional\n"
+ "\t\t'>' character added. This reversible escaping is termed\n"
+ "\t\t\"mboxrd\" format and described in detail here:\n"
+ "\n"
+ "\t\thttp://homepage.ntlworld.com/jonathan.deboynepollard/FGA/mail-mbox-formats.html\n"
+ "\n"
+ "\t\traw (default for a single part, see --part)\n"
+ "\n"
+ "\t\tFor a message, the original, raw content of the email\n"
+ "\t\tmessage is output. Consumers of this format should\n"
+ "\t\texpect to implement MIME decoding and similar functions.\n"
+ "\n"
+ "\t\tFor a single part (--part) the raw part content is output\n"
+ "\t\tafter performing any necessary MIME decoding.\n"
+ "\n"
+ "\t\tThe raw format must only be used with search terms matching\n"
+ "\t\tsingle message.\n"
+ "\n"
+ "\t--part=N\n"
+ "\n"
+ "\t\tOutput the single decoded MIME part N of a single message.\n"
+ "\t\tThe search terms must match only a single message.\n"
+ "\t\tMessage parts are numbered in a depth-first walk of the\n"
+ "\t\tmessage MIME structure, and are identified in the 'json' or\n"
+ "\t\t'text' output formats.\n"
+ "\n"
+ "\t--verify\n"
+ "\n"
+ "\t\tCompute and report the validity of any MIME cryptographic\n"
+ "\t\tsignatures found in the selected content (ie.\n"
+ "\t\t\"multipart/signed\" parts). Status of the signature will be\n"
+ "\t\treported (currently only supported with --format=json) and\n"
+ "\t\tthe multipart/signed part will be replaced by the signed data.\n"
+ "\n"
+ "\t--decrypt\n"
+ "\n"
+ "\t\tDecrypt any MIME encrypted parts found in the selected content\n"
+ "\t\t(ie. \"multipart/encrypted\" parts). Status of the decryption\n"
+ "\t\twill be reported (currently only supported with --format=json)\n"
+ "\t\tand the multipart/encrypted part will be replaced by the\n"
+ "\t\tdecrypted content.\n"
+ "\n"