MessageType:
| "OrderDeclined"
| "OrderSubmitted"
| "ShipmentCreated"
| "ForgottenPassword"
| "ForgottenUsername"
| "OrderSubmittedForYourApproval"
| "OrderSubmittedForApproval"
| "OrderApproved"
| "OrderSubmittedForYourApprovalHasBeenApproved"
| "OrderSubmittedForYourApprovalHasBeenDeclined"
| "NewUserInvitation"
| "OrderReturnDeclined"
| "OrderReturnSubmitted"
| "OrderReturnSubmittedForYourApproval"
| "OrderReturnSubmittedForApproval"
| "OrderReturnApproved"
| "OrderReturnSubmittedForYourApprovalHasBeenApproved"
| "OrderReturnSubmittedForYourApprovalHasBeenDeclined"
| "OrderReturnCompleted"
| "SubscriptionReminder"
| "ProductCollectionInvitationAccepted"
| "ProductCollectionInvitationDeclined"
| "OneTimePassword"