@type t() :: %ApolloSignal.Types.EmailDetailResponse{
  bcc: [String.t()] | nil,
  cc: [String.t()] | nil,
  created_at: String.t(),
  error: String.t() | nil,
  from: String.t(),
  html: String.t() | nil,
  id: String.t(),
  message_id: String.t() | nil,
  metadata: %{optional(String.t()) => String.t()} | nil,
  reply_to: String.t() | nil,
  sent_at: String.t() | nil,
  status: String.t(),
  subject: String.t(),
  tags: %{optional(String.t()) => String.t()} | nil,
  test_mode: boolean(),
  text: String.t() | nil,
  to: [String.t()],
  topic_id: String.t() | nil,
  updated_at: String.t() | nil
}