diff --git a/src/services/aliases/aliases.class.ts b/src/services/aliases/aliases.class.ts
index ad6bf3f..9d5bbdc 100644
--- a/src/services/aliases/aliases.class.ts
+++ b/src/services/aliases/aliases.class.ts
@@ -125,9 +125,12 @@ export class AliasesService<ServiceParams extends AliasesParams = AliasesParams>
     }
 
     sanitizeAliasResponse(alias: WildDuckAddress): AliasApiResponse {
+        // Prevent the user from deleting their main address or any address that does not end with the preferred domain
+        const isRemovable = !alias.main && alias.address.endsWith(config.get('wildDuck.domain'));
+
         // Hide the id if the alias is not removable
         return {
-            id: alias.main ? null : alias.id,
+            id: isRemovable ? alias.id : null,
             address: alias.address,
             tags: alias.tags,
             created: alias.created,