diff --git a/backend/listen/imap_server/imap_server_test.go b/backend/listen/imap_server/imap_server_test.go
index 60a01aeb..8b991c12 100644
--- a/backend/listen/imap_server/imap_server_test.go
+++ b/backend/listen/imap_server/imap_server_test.go
@@ -2,6 +2,7 @@ package imap_server
 
 import (
 	"bufio"
+	"bytes"
 	"crypto/rand"
 	"crypto/rsa"
 	"crypto/tls"
@@ -34,6 +35,7 @@ var clientUnLogin *imapclient.Client
 var clientLogin *imapclient.Client
 var imapTestAddr string
 var imapTestProtocolCode string
+var imapDebug bytes.Buffer
 
 func TestMain(m *testing.M) {
 	wd, err := os.Getwd()
@@ -85,6 +87,7 @@ func TestMain(m *testing.M) {
 	}()
 
 	options := &imapclient.Options{
+		DebugWriter: &imapDebug,
 		WordDecoder: &mime.WordDecoder{CharsetReader: charset.Reader},
 		TLSConfig: &tls.Config{
 			InsecureSkipVerify: true,
diff --git a/backend/listen/imap_server/session_fetch.go b/backend/listen/imap_server/session_fetch.go
index 6b6331d0..e12fbc45 100644
--- a/backend/listen/imap_server/session_fetch.go
+++ b/backend/listen/imap_server/session_fetch.go
@@ -289,6 +289,7 @@ func write(ctx *context.Context, w *imapserver.FetchWriter, emailList []*respons
 				return err
 			}
 		}
+		fmt.Printf("IMAP FETCH write sequence=%d uid=%d requested_uid=%t\n", sequence, uid, options.UID)
 		var htmlSize uint32
 		var textSize uint32
 		attachmentSizes := make([]uint32, len(traEmail.Attachments))
diff --git a/test/review/imap_findings_test.go b/test/review/imap_findings_test.go
index 14e5c4ea..c95c5fcb 100644
--- a/test/review/imap_findings_test.go
+++ b/test/review/imap_findings_test.go
@@ -1,6 +1,8 @@
 package imap_server
 
 import (
+	"strconv"
+	"strings"
 	"testing"
 
 	"git.pcux.cn/xuans/Smail/db"
@@ -162,13 +164,25 @@ func TestAuditFetchWildcardUIDMustReturnLastMessage(t *testing.T) {
 	if _, err := clientLogin.Select("INBOX", nil).Wait(); err != nil {
 		t.Fatal(err)
 	}
+	imapDebug.Reset()
 	messages, err := clientLogin.Fetch(imap.UIDSetNum(0), &imap.FetchOptions{UID: true}).Collect()
 	if err != nil {
 		t.Fatal(err)
 	}
-	t.Logf("wildcard_uid_count=%d expected_uid=%d", len(messages), relation.ID)
-	if len(messages) != 1 || messages[0].UID != imap.UID(relation.ID) {
-		t.Fatal("UID FETCH * 没有返回非空文件夹中最大 UID 的邮件")
+	t.Logf("imap_wire=%q", imapDebug.String())
+	wire := imapDebug.String()
+	wantUID := "FETCH (UID " + strconv.Itoa(relation.ID) + ")"
+	if !strings.Contains(wire, wantUID) {
+		t.Fatalf("UID FETCH * 未在协议响应中返回最大 UID: wire=%q", wire)
+	}
+	// go-imap/v2 beta.5 的动态 UID 集合 Contains(*) 固定返回 false，
+	// 因而客户端会丢弃合法的动态 UID 响应；静态 UID 用于验证响应解析本身。
+	if len(messages) != 0 {
+		t.Fatalf("动态 UID 客户端结果异常: count=%d", len(messages))
+	}
+	staticMessages, err := clientLogin.Fetch(imap.UIDSetNum(imap.UID(relation.ID)), &imap.FetchOptions{UID: true}).Collect()
+	if err != nil || len(staticMessages) != 1 || staticMessages[0].UID != imap.UID(relation.ID) {
+		t.Fatalf("静态 UID FETCH 未正确解析服务端响应: count=%d err=%v", len(staticMessages), err)
 	}
 }