diff --git a/src/config.ts b/src/config.ts
index 42e5096..21f84a2 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -1,5 +1,6 @@
 export const LOCAL_DOMAIN = Deno.env.get('LOCAL_DOMAIN') || 'http://localhost:8000';
 export const POST_CHAR_LIMIT = Number(Deno.env.get('POST_CHAR_LIMIT') || 5000);
+export const ADMIN_EMAIL = Deno.env.get('ADMIN_EMAIL') || 'webmaster@localhost';
 
 export const poolRelays = (Deno.env.get('RELAY_POOL') || '').split(',').filter(Boolean);
 export const publishRelays = ['wss://relay.mostr.pub'];
diff --git a/src/controllers/api/instance.ts b/src/controllers/api/instance.ts
index 008ca24..1cf0fd2 100644
--- a/src/controllers/api/instance.ts
+++ b/src/controllers/api/instance.ts
@@ -1,4 +1,4 @@
-import { LOCAL_DOMAIN, POST_CHAR_LIMIT } from '@/config.ts';
+import { ADMIN_EMAIL, LOCAL_DOMAIN, POST_CHAR_LIMIT } from '@/config.ts';
 
 import type { Context } from '@/deps.ts';
 
@@ -38,6 +38,7 @@ function instanceController(c: Context) {
       streaming_api: `wss://${host}`,
     },
     version: '0.0.0 (compatible; Ditto 0.0.1)',
+    email: ADMIN_EMAIL,
     rules: [],
   });
 }