diff --git a/examples/simple.rs b/examples/simple.rs
index 5bdd45c..f64ffaf 100644
--- a/examples/simple.rs
+++ b/examples/simple.rs
@@ -1,21 +1,41 @@
 use miette::{IntoDiagnostic, Result};
 
+use imap_codec::types::command::CommandBody;
+
+use tracing::info;
+
 use boitalettres::proto::{Request, Response};
 use boitalettres::server::accept::addr::{AddrIncoming, AddrStream};
 use boitalettres::server::Server;
 
-async fn handle_req(_req: Request) -> Result<Response> {
+async fn handle_req(req: Request) -> Result<Response> {
     use imap_codec::types::response::{Capability, Data as ImapData};
 
     use boitalettres::proto::res::{body::Data, Status};
 
-    let capabilities = vec![Capability::Imap4Rev1, Capability::Idle];
-    let body: Vec<Data> = vec![
-        Status::ok("Yeah")?.into(),
-        ImapData::Capability(capabilities).into(),
-    ];
+    info!("Handling request: {:?}", req);
 
-    Ok(Response::ok("Done")?.with_body(body))
+    match req.command.body {
+        CommandBody::Noop => Ok(Response::ok("NOOP done")?),
+        CommandBody::Capability => {
+            let capabilities = vec![Capability::Imap4Rev1, Capability::Idle];
+            let body: Vec<Data> = vec![
+                Status::ok("Yeah")?.into(),
+                ImapData::Capability(capabilities).into(),
+            ];
+
+            Ok(Response::ok("CAPABILITY done")?.with_body(body))
+        }
+        CommandBody::Login { .. } => Ok(Response::ok("Faking successfull LOGIN")?),
+        CommandBody::Append { .. } => Ok(Response::ok("Faking successfull APPEND")?),
+        CommandBody::Logout { .. } => {
+            let body: Vec<Data> = vec![Status::bye("Logging out")?.into()];
+            Ok(Response::ok("LOGOUT completed")?
+                .with_body(body)
+                .close(true))
+        }
+        _ => Ok(Response::no("unavailable command")?),
+    }
 }
 
 #[tokio::main]
diff --git a/scripts/test_imap.py b/scripts/test_imap.py
old mode 100644
new mode 100755
index f8bdf17..ec51b96
--- a/scripts/test_imap.py
+++ b/scripts/test_imap.py
@@ -2,6 +2,24 @@
 from imaplib import IMAP4
 
 conn = IMAP4('127.0.0.1', port=4567)
+print("Connected")
+
 conn.noop()
+print("NOOP done")
+
+conn.login("lx", "plop")
+print("Logged in")
+
+print("Testing APPEND (this uses continuation style)")
+conn.append("INBOX", [], None,
+b"""From: alex@adnab.me
+To: lx@deuxfleurs.fr
+Subject: Hello, world!
+
+Test
+.
+""")
+print("Append done")
 
 conn.logout()
+print("Logged out")
diff --git a/scripts/test_imap.sh b/scripts/test_imap.sh
new file mode 100755
index 0000000..f729392
--- /dev/null
+++ b/scripts/test_imap.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+# APPEND example from RFC9051
+
+nc localhost 4567 <<EOF
+A CAPABILITY
+B LOGIN lx plop
+C APPEND saved-messages (\\Seen) {297+}
+Date: Mon, 7 Feb 1994 21:52:25 -0800 (PST)
+From: Fred Foobar <foobar@example.com>
+Subject: afternoon meeting
+To: mooch@example.com
+Message-Id: <B27397-0100000@example.com>
+MIME-Version: 1.0
+Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
+
+Hello Joe, do you think we can meet at 3:30 tomorrow?
+
+D NOOP
+E LOGOUT
+EOF
+
+echo "^ expected output: responses to A B C D and E, last one is E OK LOGOUT completed"
diff --git a/src/util/buf.rs b/src/util/buf.rs
index e69de29..8b13789 100644
--- a/src/util/buf.rs
+++ b/src/util/buf.rs
@@ -0,0 +1 @@
+