From d1f5010378ecea22a013b7257de413b8deb99e26 Mon Sep 17 00:00:00 2001
From: mdecimus <mauro@stalw.art>
Date: Mon, 2 Jun 2025 12:01:20 +0200
Subject: [PATCH] Return Queue IDs during message acceptance (closes #927)

---
 crates/smtp/src/inbound/data.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/crates/smtp/src/inbound/data.rs b/crates/smtp/src/inbound/data.rs
index 33c808cc..eb8f3cbc 100644
--- a/crates/smtp/src/inbound/data.rs
+++ b/crates/smtp/src/inbound/data.rs
@@ -682,7 +682,9 @@ impl<T: SessionStream> Session<T> {
             {
                 self.state = State::Accepted(queue_id);
                 self.data.messages_sent += 1;
-                (b"250 2.0.0 Message queued for delivery.\r\n"[..]).into()
+                format!("250 2.0.0 Message queued with id {queue_id:x}.\r\n")
+                    .into_bytes()
+                    .into()
             } else {
                 (b"451 4.3.5 Unable to accept message at this time.\r\n"[..]).into()
             }