diff --git a/Cargo.lock b/Cargo.lock
index 4fdfe0d5..56ee296c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -16,6 +16,11 @@ name = "antidote"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "array_tool"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "arrayvec"
 version = "0.4.7"
@@ -801,6 +806,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "plume"
 version = "0.1.0"
 dependencies = [
+ "array_tool 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "base64 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "bcrypt 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1575,6 +1581,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum adler32 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6cbd0b9af8587c72beadc9f72d35b9fbb070982c9e6203e46e93f10df25f8f45"
 "checksum aho-corasick 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)" = "d6531d44de723825aa81398a6415283229725a00fa30713812ab9323faa82fc4"
 "checksum antidote 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "34fde25430d87a9388dadbe6e34d7f72a462c8b43ac8d309b42b0a8505d7e2a5"
+"checksum array_tool 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "8f8cb5d814eb646a863c4f24978cff2880c4be96ad8cde2c0f0678732902e271"
 "checksum arrayvec 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)" = "a1e964f9e24d588183fcb43503abda40d288c8657dfc27311516ce2f05675aef"
 "checksum backtrace 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "ebbe525f66f42d207968308ee86bc2dd60aa5fab535b22e616323a173d097d8e"
 "checksum backtrace-sys 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)" = "44585761d6161b0f57afc49482ab6bd067e4edef48c12a152c237eb0203f7661"
diff --git a/Cargo.toml b/Cargo.toml
index fa438fde..71a3234d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,6 +3,7 @@ authors = ["Bat' <baptiste@gelez.xyz>"]
 name = "plume"
 version = "0.1.0"
 [dependencies]
+array_tool = "1.0"
 base64 = "0.9"
 bcrypt = "0.2"
 dotenv = "*"
diff --git a/src/activity_pub/actor.rs b/src/activity_pub/actor.rs
index 2699aceb..ab5f6c5e 100644
--- a/src/activity_pub/actor.rs
+++ b/src/activity_pub/actor.rs
@@ -1,12 +1,8 @@
 use diesel::PgConnection;
-use reqwest::Client;
 use serde_json;
 
 use BASE_URL;
 use activity_pub::{activity_pub, ActivityPub, context, ap_url};
-use activity_pub::activity::Activity;
-use activity_pub::request;
-use activity_pub::sign::*;
 use models::instance::Instance;
 
 pub enum ActorType {
@@ -38,6 +34,8 @@ pub trait Actor: Sized {
 
     fn get_inbox_url(&self) -> String;
 
+    fn get_shared_inbox_url(&self) -> Option<String>;
+
     fn custom_props(&self, _conn: &PgConnection) -> serde_json::Map<String, serde_json::Value> {
         serde_json::Map::new()
     }
@@ -84,23 +82,5 @@ pub trait Actor: Sized {
         ))
     }
 
-    fn send_to_inbox<A: Activity, S: Actor + Signer>(&self, conn: &PgConnection, sender: &S, act: A) {
-        let mut act = act.serialize();
-        act["@context"] = context();
-        let signed = act.sign(sender, conn);
-        
-        let res = Client::new()
-            .post(&self.get_inbox_url()[..])
-            .headers(request::headers())
-            .header(request::signature(sender, request::headers(), conn))
-            .header(request::digest(signed.to_string()))
-            .body(signed.to_string())
-            .send();
-        match res {
-            Ok(mut r) => println!("Successfully sent activity to inbox ({})\n\n{:?}", self.get_inbox_url(), r.text().unwrap()),
-            Err(e) => println!("Error while sending to inbox ({:?})", e)
-        }
-    }
-
     fn from_url(conn: &PgConnection, url: String) -> Option<Self>;
 }
diff --git a/src/activity_pub/inbox.rs b/src/activity_pub/inbox.rs
index 0a49fe2f..2eb36ccc 100644
--- a/src/activity_pub/inbox.rs
+++ b/src/activity_pub/inbox.rs
@@ -3,6 +3,7 @@ use serde_json;
 
 use activity_pub::activity;
 use activity_pub::actor::Actor;
+use activity_pub::outbox::broadcast;
 use activity_pub::sign::*;
 use models::blogs::Blog;
 use models::comments::*;
@@ -79,7 +80,7 @@ pub trait Inbox: Actor + Sized {
         }
     }
 
-    fn accept_follow<A: Actor, B: Actor + Signer, T: activity::Activity>(
+    fn accept_follow<A: Actor + Signer, B: Actor + Clone, T: activity::Activity>(
         &self,
         conn: &PgConnection,
         from: &A,
@@ -94,6 +95,6 @@ pub trait Inbox: Actor + Sized {
         });
 
         let accept = activity::Accept::new(target, follow, conn);
-        from.send_to_inbox(conn, target, accept)
+        broadcast(conn, from, accept, vec![target.clone()]);
     }
 }
diff --git a/src/activity_pub/outbox.rs b/src/activity_pub/outbox.rs
index 3c991fdb..8b310625 100644
--- a/src/activity_pub/outbox.rs
+++ b/src/activity_pub/outbox.rs
@@ -1,4 +1,6 @@
+use array_tool::vec::Uniq;
 use diesel::PgConnection;
+use reqwest::Client;
 use rocket::http::Status;
 use rocket::response::{Response, Responder};
 use rocket::request::Request;
@@ -8,8 +10,8 @@ use std::sync::Arc;
 use activity_pub::{activity_pub, ActivityPub, context};
 use activity_pub::activity::Activity;
 use activity_pub::actor::Actor;
-use activity_pub::sign::Signer;
-use models::users::User;
+use activity_pub::request;
+use activity_pub::sign::*;
 
 pub struct Outbox {
     id: String,
@@ -42,8 +44,28 @@ impl<'r> Responder<'r> for Outbox {
     }
 }
 
-pub fn broadcast<A: Activity + Clone, S: Actor + Signer>(conn: &PgConnection, sender: &S, act: A, to: Vec<User>) {
-    for user in to {
-        user.send_to_inbox(conn, sender, act.clone()); // TODO: run it in Sidekiq or something like that
+pub fn broadcast<A: Activity + Clone, S: Actor + Signer, T: Actor>(conn: &PgConnection, sender: &S, act: A, to: Vec<T>) {
+    let boxes = to.into_iter()
+        .map(|u| u.get_shared_inbox_url().unwrap_or(u.get_inbox_url()))
+        .collect::<Vec<String>>()
+        .unique();
+    for inbox in boxes {
+        // TODO: run it in Sidekiq or something like that        
+        
+        let mut act = act.serialize();
+        act["@context"] = context();
+        let signed = act.sign(sender, conn);
+        
+        let res = Client::new()
+            .post(&inbox[..])
+            .headers(request::headers())
+            .header(request::signature(sender, request::headers(), conn))
+            .header(request::digest(signed.to_string()))
+            .body(signed.to_string())
+            .send();
+        match res {
+            Ok(mut r) => println!("Successfully sent activity to inbox ({})\n\n{:?}", inbox, r.text().unwrap()),
+            Err(e) => println!("Error while sending to inbox ({:?})", e)
+        }
     }
 }
diff --git a/src/main.rs b/src/main.rs
index 2445a2ca..2d16db20 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,7 @@
 #![feature(plugin, custom_derive, iterator_find_map)]
 #![plugin(rocket_codegen)]
 
+extern crate array_tool;
 extern crate base64;
 extern crate bcrypt;
 extern crate chrono;
diff --git a/src/models/blogs.rs b/src/models/blogs.rs
index 46117dcc..1dc3240e 100644
--- a/src/models/blogs.rs
+++ b/src/models/blogs.rs
@@ -15,7 +15,7 @@ use models::instance::Instance;
 use schema::blogs;
 
 
-#[derive(Queryable, Identifiable, Serialize)]
+#[derive(Queryable, Identifiable, Serialize, Clone)]
 pub struct Blog {
     pub id: i32,
     pub actor_id: String,
@@ -130,6 +130,10 @@ impl Actor for Blog {
         self.inbox_url.clone()
     }
 
+    fn get_shared_inbox_url(&self) -> Option<String> {
+        None
+    }
+
     fn from_url(conn: &PgConnection, url: String) -> Option<Blog> {
         blogs::table.filter(blogs::ap_url.eq(url))
             .limit(1)
diff --git a/src/models/users.rs b/src/models/users.rs
index 50e6d0e3..6d16165d 100644
--- a/src/models/users.rs
+++ b/src/models/users.rs
@@ -300,6 +300,10 @@ impl Actor for User {
         self.inbox_url.clone()
     }
 
+    fn get_shared_inbox_url(&self) -> Option<String> {
+       None
+    }
+
     fn custom_props(&self, conn: &PgConnection) -> serde_json::Map<String, serde_json::Value> {
         let mut res = serde_json::Map::new();
         res.insert("publicKey".to_string(), json!({
diff --git a/src/routes/user.rs b/src/routes/user.rs
index 863fa0c6..2f053f47 100644
--- a/src/routes/user.rs
+++ b/src/routes/user.rs
@@ -6,7 +6,7 @@ use serde_json;
 use activity_pub::{activity, activity_pub, ActivityPub, context};
 use activity_pub::actor::Actor;
 use activity_pub::inbox::Inbox;
-use activity_pub::outbox::Outbox;
+use activity_pub::outbox::{broadcast, Outbox};
 use db_conn::DbConn;
 use models::follows::*;
 use models::instance::Instance;
@@ -48,7 +48,7 @@ fn follow(name: String, conn: DbConn, user: User) -> Redirect {
         follower_id: user.id,
         following_id: target.id
     });
-    target.send_to_inbox(&*conn, &user, activity::Follow::new(&user, &target, &*conn));
+    broadcast(&*conn, &user, activity::Follow::new(&user, &target, &*conn), vec![target]);
     Redirect::to(format!("/@/{}", name).as_ref())
 }