Values.ContentSourceAn object that represents the content of the email, and optionally a character set specification.
type nonrec t = {data : MessageData.t;The content of the message itself.
*)charset : Charset.t option;The character set for the content. Because of the constraints of the SMTP protocol, Amazon SES uses 7-bit ASCII by default. If the text includes characters outside of the ASCII range, you have to specify a character set. For example, you could specify UTF-8, ISO-8859-1, or Shift_JIS.
*)}