Increased concurrency for local message delivery

tests/src/jmap/mod.rs

@@ -381,9 +381,9 @@ pub async fn jmap_tests() {
     email_query_changes::test(&mut params).await;
     email_copy::test(&mut params).await;
     thread_get::test(&mut params).await;
-    thread_merge::test(&mut params).await;
+    thread_merge::test(&mut params).await;*/
     mailbox::test(&mut params).await;
-    delivery::test(&mut params).await;*/
+    delivery::test(&mut params).await;
     auth_acl::test(&mut params).await;
     auth_limits::test(&mut params).await;
     auth_oauth::test(&mut params).await;

tests/src/smtp/queue/concurrent.rs

@@ -22,8 +22,8 @@ relay = true
 [session.data.limits]
 messages = 2000
 
-[queue.outbound]
-concurrency = 4
+[queue.threads]
+remote = 4
 
 [queue.schedule]
 retry = "1s"