diff --git a/bun.lock b/bun.lock
index 4885469..35569ac 100644
--- a/bun.lock
+++ b/bun.lock
@@ -37,6 +37,7 @@
         "@types/better-sqlite3": "7.6.13",
         "@types/markdown-it": "14.1.2",
         "@types/multer": "2.1.0",
+        "@types/nodemailer": "^8.0.0",
         "@types/pg": "8.20.0",
         "bun-types": "1.3.12",
         "drizzle-kit": "0.31.10",
@@ -857,6 +858,8 @@
 
     "@types/node": ["@types/node@25.6.0", "", { "dependencies": { "undici-types": "~7.19.0" } }, "sha512-+qIYRKdNYJwY3vRCZMdJbPLJAtGjQBudzZzdzwQYkEPQd+PJGixUL5QfvCLDaULoLv+RhT3LDkwEfKaAkgSmNQ=="],
 
+    "@types/nodemailer": ["@types/nodemailer@8.0.0", "", { "dependencies": { "@types/node": "*" } }, "sha512-fyf8jWULsCo0d0BuoQ75i6IeoHs47qcqxWc7yUdUcV0pOZGjUTTOvwdG1PRXUDqN/8A64yQdQdnA2pZgcdi+cA=="],
+
     "@types/pg": ["@types/pg@8.20.0", "", { "dependencies": { "@types/node": "*", "pg-protocol": "*", "pg-types": "^2.2.0" } }, "sha512-bEPFOaMAHTEP1EzpvHTbmwR8UsFyHSKsRisLIHVMXnpNefSbGA1bD6CVy+qKjGSqmZqNqBDV2azOBo8TgkcVow=="],
 
     "@types/qs": ["@types/qs@6.15.0", "", {}, "sha512-JawvT8iBVWpzTrz3EGw9BTQFg3BQNmwERdKE22vlTxawwtbyUSlMppvZYKLZzB5zgACXdXxbD3m1bXaMqP/9ow=="],
diff --git a/package.json b/package.json
index 9af8330..b3bc43a 100644
--- a/package.json
+++ b/package.json
@@ -51,6 +51,7 @@
     "@types/better-sqlite3": "7.6.13",
     "@types/markdown-it": "14.1.2",
     "@types/multer": "2.1.0",
+    "@types/nodemailer": "^8.0.0",
     "@types/pg": "8.20.0",
     "bun-types": "1.3.12",
     "drizzle-kit": "0.31.10",
diff --git a/packages/drizzle-pkg/db.sqlite b/packages/drizzle-pkg/db.sqlite
index df4dbd1..62e6504 100644
Binary files a/packages/drizzle-pkg/db.sqlite and b/packages/drizzle-pkg/db.sqlite differ
diff --git a/server/api/config/global/comment-email-test.post.ts b/server/api/config/global/comment-email-test.post.ts
index 1ae2340..6c7950c 100644
--- a/server/api/config/global/comment-email-test.post.ts
+++ b/server/api/config/global/comment-email-test.post.ts
@@ -1,3 +1,4 @@
+import log4js from "logger";
 import { dbGlobal } from "drizzle-pkg/lib/db";
 import { users } from "drizzle-pkg/lib/schema/auth";
 import { eq } from "drizzle-orm";
@@ -9,6 +10,8 @@ import {
   sendCommentEmailTestMail,
 } from "#server/service/comment-email/test-mail";
 
+const logger = log4js.getLogger("COMMENT_EMAIL_TEST");
+
 export default defineWrappedResponseHandler(async (event) => {
   const ip = getRequestIP(event, { xForwardedFor: true }) ?? "unknown";
   assertUnderRateLimit(`admin-config-comment-email-test:${ip}`, 5, 60_000);
@@ -21,19 +24,21 @@ export default defineWrappedResponseHandler(async (event) => {
     .where(eq(users.id, admin.id))
     .limit(1);
 
+  const commentEmailConfig = {
+    enabled: await event.context.config.getGlobal("commentEmailNotifyEnabled"),
+    fromEmail: await event.context.config.getGlobal("commentMailFromEmail"),
+    smtpHost: await event.context.config.getGlobal("commentSmtpHost"),
+    smtpPort: await event.context.config.getGlobal("commentSmtpPort"),
+    smtpSecure: await event.context.config.getGlobal("commentSmtpSecure"),
+    smtpUser: await event.context.config.getGlobal("commentSmtpUser"),
+    smtpPass: await event.context.config.getGlobal("commentSmtpPass"),
+  };
+
   try {
     await sendCommentEmailTestMail({
       toEmail: adminRow?.email ?? "",
       requestedBy: admin.username,
-      config: {
-        enabled: await event.context.config.getGlobal("commentEmailNotifyEnabled"),
-        fromEmail: await event.context.config.getGlobal("commentMailFromEmail"),
-        smtpHost: await event.context.config.getGlobal("commentSmtpHost"),
-        smtpPort: await event.context.config.getGlobal("commentSmtpPort"),
-        smtpSecure: await event.context.config.getGlobal("commentSmtpSecure"),
-        smtpUser: await event.context.config.getGlobal("commentSmtpUser"),
-        smtpPass: await event.context.config.getGlobal("commentSmtpPass"),
-      },
+      config: commentEmailConfig,
     });
     return R.success({
       message: "测试邮件发送成功，请检查管理员邮箱",
@@ -45,6 +50,16 @@ export default defineWrappedResponseHandler(async (event) => {
         statusMessage: error.message,
       });
     }
+    logger.error(
+      "[send-test-mail-failed]",
+      `adminId=${admin.id}`,
+      `adminUsername=${admin.username}`,
+      `smtpHost=${commentEmailConfig.smtpHost}`,
+      `smtpPort=${commentEmailConfig.smtpPort}`,
+      `smtpSecure=${commentEmailConfig.smtpSecure}`,
+      error instanceof Error ? error.message : String(error),
+      error instanceof Error ? (error.stack ?? "") : "",
+    );
     throw createError({
       statusCode: 502,
       statusMessage: "测试邮件发送失败，请检查 SMTP 配置或稍后重试",
diff --git a/server/service/comment-notify/index.ts b/server/service/comment-notify/index.ts
index 6eb2978..daf75f1 100644
--- a/server/service/comment-notify/index.ts
+++ b/server/service/comment-notify/index.ts
@@ -42,6 +42,13 @@ function getReason(error: unknown): string {
   return "unknown";
 }
 
+function getStack(error: unknown): string {
+  if (error instanceof Error && hasValue(error.stack ?? "")) {
+    return error.stack ?? "";
+  }
+  return "";
+}
+
 function isValidEmail(value: string): boolean {
   return EMAIL_REGEX.test(value.trim());
 }
@@ -205,6 +212,7 @@ export async function notifyReplyCommentCreated(
       commentId: input.commentId,
       receiverUserId,
       reason: getReason(error),
+      stack: getStack(error),
     });
   }
 }