diff --git a/lambda/notifications.tf b/lambda/notifications.tf
index f45bb1f..29a02e1 100644
--- a/lambda/notifications.tf
+++ b/lambda/notifications.tf
@@ -27,6 +27,7 @@ resource "aws_lambda_function" "notifications_lambda_function" {
       TRANSFER_COMPLETE_TEMPLATE_ID = aws_kms_ciphertext.environment_vars_notifications["transfer_complete_template_id"].ciphertext_blob
       GOV_UK_NOTIFY_API_KEY         = aws_kms_ciphertext.environment_vars_notifications["gov_uk_notify_api_key"].ciphertext_blob
       SEND_GOV_UK_NOTIFICATIONS     = aws_kms_ciphertext.environment_vars_notifications["send_gov_uk_notifications"].ciphertext_blob
+      TDR_INBOX_EMAIL               = aws_kms_ciphertext.environment_vars_notifications["tdr_inbox_email"].ciphertext_blob
     }
   }
 
@@ -52,6 +53,7 @@ resource "aws_kms_ciphertext" "environment_vars_notifications" {
     transfer_complete_template_id = data.aws_ssm_parameter.gov_uk_transfer_complete_template_id[0].value
     gov_uk_notify_api_key         = data.aws_ssm_parameter.gov_uk_notify_api_key[0].value
     send_gov_uk_notifications     = local.environment == "prod"
+    tdr_inbox_email               = local.environment == "prod" ? "tdr@nationalarchives.gov.uk" : "tdrtest@nationalarchives.gov.uk"
   }
   # This lambda is created by the tdr-terraform-backend project as it only exists in the management account so we can't use any KMS keys
   # created by the terraform environments project as they won't exist when we first run the backend project.