diff --git a/web-app/app/lib/db-types.ts b/web-app/app/lib/db-types.ts
index 87a93ef..0114864 100644
--- a/web-app/app/lib/db-types.ts
+++ b/web-app/app/lib/db-types.ts
@@ -1,3 +1,4 @@
+import { unsubscribe } from "diagnostics_channel";
 
 export interface FileAttachment {
     fileName: string;
@@ -35,6 +36,23 @@ export interface UserSettings {
     ownerRevolutProfileName?: string | null;
 };
 
+enum EmailStatus {
+    /** Email is not yet verified - recipient has not yet confirmed their email address */
+    Unverified = "unverified",
+    /** Email is verified and is in good standing: emails are being successfully delivered */
+    Verified = "verified",
+    /** Emails sent to this address have hard bounced - no further attempts of delivery will be made */
+    HardBounced = "hard-bounced",
+    /** Emails sent to this address have soft bounced less than the maximum allowed count - further attempts of delivery may be made */
+    SoftBounced = "soft-bounced",
+    /** Emails sent to this address have soft bounced more than the maximum allowed count - no further attempts of delivery will be made */
+    SoftBounceMaxCountReached = "soft-bounce-max-count-reached",
+    /** Recepient has complained about receiving emails - no further emails will be sent */
+    Complaint = "complaint",
+    /** Recepient has unsubscribed from receiving emails via link - no further emails will be sent */
+    Unsubscribed = "unsubscribed"
+}
+
 /** bill object in the form returned by MongoDB */
 export interface BillingLocation {
     _id: string;
@@ -67,6 +85,10 @@ export interface BillingLocation {
     autoBillFwd?: boolean | null;
     /** (optional) tenant email */
     tenantEmail?: string | null;
+    /** (optional) tenant email status */
+    tenantEmailStatus?: EmailStatus | null;
+    /** (optional) tenant email soft bounce count (gets reset on successful delivery) */
+    tenantEmailSoftBounceCount?: number | null;
     /** (optional) bill forwarding strategy */
     billFwdStrategy?: "when-payed" | "when-attached" | null;
     /** (optional) whether to automatically send rent notification */