The purpose of the 8bit-MIME extension is to allow the transport of message content with text containing octets outside of the US-ASCII octet range (hex 00-7F). By default, SMTP restricts message text to 7-bit US-ASCII with lines of 1000 characters. The standard ASCII character set uses just 7 bits for each character; however, there are several larger character sets that use 8 bits, which gives them 128 additional characters. The extra characters are used to represent non-English characters, graphics symbols, and mathematical symbol Choose one: