@type t() :: %MailSlurpAPI.Model.ReplyToEmailOptions{
  attachments: [String.t()] | nil,
  body: String.t(),
  charset: String.t() | nil,
  from: String.t() | nil,
  html: boolean() | nil,
  isHTML: boolean(),
  replyTo: String.t() | nil,
  sendStrategy: String.t() | nil,
  template: String.t() | nil,
  templateVariables: %{optional(String.t()) => Map} | nil,
  useInboxName: boolean() | nil
}