MIME Mappings for Filename Extensions

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The AddFileAttachment automatically chooses the appropriate content-type for the email attachment based on the file extension of the filename, and returns the chosen content-type. On the other hand, The email object's AddFileAttachment2 method lets you specifically choose the content-type you wish to use with the attached file.
The current MIME mappings (file extension --> content-type) used by Chilkat are shown below:
// Extracted from internal Chilkat source code...

static char *MimeMappings[] = {


    "abs",
    "audio/x-mpeg",



    "ai",
    "application/postscript",



    "aif",
    "audio/x-aiff",



    "aifc",
    "audio/x-aiff",



    "aiff",
    "audio/x-aiff",



    "aim",
    "application/x-aim",



    "art",
    "image/x-jg",



    "asf",
    "video/x-ms-asf",



    "asx",
    "video/x-ms-asf",



    "au",
    "audio/basic",



    "avi",
    "video/x-msvideo",



    "avx",
    "video/x-rad-screenplay",



    "bcpio",
    "application/x-bcpio",



    "bin",
    "application/octet-stream",



    "bmp",
    "image/bmp",



    "body",
    "text/html",



    "cdf",
    "application/x-cdf",



    "cer",
    "application/x-x509-ca-cert",



    "class",
    "application/java",



    "cpio",
    "application/x-cpio",



    "csh",
    "application/x-csh",



    "css",
    "text/css",



    "dib",
    "image/bmp",



    "doc",
    "application/msword",



    "dtd",
    "text/plain",



    "dv",
    "video/x-dv",



    "dvi",
    "application/x-dvi",



    "eps",
    "application/postscript",



    "etx",
    "text/x-setext",



    "exe",
    "application/octet-stream",



    "gif",
    "image/gif",



    "gtar",
    "application/x-gtar",



    "gz",
    "application/x-gzip",



    "hdf",
    "application/x-hdf",



    "hqx",
    "application/mac-binhex40",



    "htc",
    "text/x-component",



    "htm",
    "text/html",



    "html",
    "text/html",



    "hqx",
    "application/mac-binhex40",



    "ief",
    "image/ief",



    "jad",
    "text/vnd.sun.j2me.app-descriptor",



    "jar",
    "application/java-archive",



    "java",
    "text/plain",



    "jnlp",
    "application/x-java-jnlp-file",



    "jpe",
    "image/jpeg",



    "jpeg",
    "image/jpeg",



    "jpg",
    "image/jpeg",



    "js",
    "text/javascript",



    "kar",
    "audio/x-midi",



    "latex",
    "application/x-latex",



    "m3u",
    "audio/x-mpegurl",



    "mac",
    "image/x-macpaint",



    "man",
    "application/x-troff-man",



    "me",
    "application/x-troff-me",



    "mid",
    "audio/x-midi",



    "midi",
    "audio/x-midi",



    "mif",
    "application/x-mif",



    "mov",
    "video/quicktime",



    "movie",
    "video/x-sgi-movie",



    "mp1",
    "audio/x-mpeg",



    "mp2",
    "audio/x-mpeg",



    "mp3",
    "audio/x-mpeg",



    "mpa",
    "audio/x-mpeg",



    "mpe",
    "video/mpeg",



    "mpeg",
    "video/mpeg",



    "mpega",
    "audio/x-mpeg",



    "mpg",
    "video/mpeg",



    "mpv2",
    "video/mpeg2",



    "ms",
    "application/x-wais-source",



    "nc",
    "application/x-netcdf",



    "oda",
    "application/oda",



    "pbm",
    "image/x-portable-bitmap",



    "pct",
    "image/pict",



    "pdf",
    "application/pdf",



    "pgm",
    "image/x-portable-graymap",



    "pic",
    "image/pict",



    "pict",
    "image/pict",



    "pls",
    "audio/x-scpls",



    "png",
    "image/png",



    "pnm",
    "image/x-portable-anymap",



    "pnt",
    "image/x-macpaint",



    "ppm",
    "image/x-portable-pixmap",



    "ps",
    "application/postscript",



    "psd",
    "image/x-photoshop",



    "qt",
    "video/quicktime",



    "qti",
    "image/x-quicktime",



    "qtif",
    "image/x-quicktime",



    "ras",
    "image/x-cmu-raster",



    "rgb",
    "image/x-rgb",



    "rm",
    "application/vnd.rn-realmedia",



    "roff",
    "application/x-troff",



    "rtf",
    "application/rtf",



    "rtx",
    "text/richtext",



    "sh",
    "application/x-sh",



    "shar",
    "application/x-shar",



    "smf",
    "audio/x-midi",



    "snd",
    "audio/basic",



    "src",
    "application/x-wais-source",



    "sv4cpio",
    "application/x-sv4cpio",



    "sv4crc",
    "application/x-sv4crc",



    "swf",
    "application/x-shockwave-flash",



    "t",
    "application/x-troff",



    "tar",
    "application/x-tar",



    "tcl",
    "application/x-tcl",



    "tex",
    "application/x-tex",



    "texi",
    "application/x-texinfo",



    "texinfo",
    "application/x-texinfo",



    "tif",
    "image/tiff",



    "tiff",
    "image/tiff",



    "tr",
    "application/x-troff",



    "tsv",
    "text/tab-separated-values",



    "txt",
    "text/plain",



    "ulw",
    "audio/basic",



    "ustar",
    "application/x-ustar",



    "xbm",
    "image/x-xbitmap",



    "xpm",
    "image/x-xpixmap",



    "xwd",
    "image/x-xwindowdump",



    "wav",
    "audio/x-wav",



    "wbmp",
    "image/vnd.wap.wbmp",



    "wml",
    "text/vnd.wap.wml",



    "wmlc",
    "application/vnd.wap.wmlc",



    "wmls",
    "text/vnd.wap.wmls",



    "wmlscriptc",
    "application/vnd.wap.wmlscriptc",



    "wrl",
    "x-world/x-vrml",



    "Z",
    "application/x-compress",



    "z",
    "application/x-compress",



    "zip",
    "application/zip",



    "xml",
    "text/xml",


    0,
    0


    };