The format of these fragments is MIME-compliant. Maximum sizes can be specified in blocks, bytes, or lines. A block is 1024 bytes. Restrictions on total bytes and total lines can be active simultaneously. MODE Specifies the mode used to read files subsequently processed by the SEND command.
TEXT mode is used to send plain text files.
SEND Sends the requested file or files. You can specify a directory, filename, and file type when using the SEND command. Wildcards may be used to request multiple files.