diff --git a/core/services.yaml b/core/services.yaml
index 763021c..2e4bc41 100644
--- a/core/services.yaml
+++ b/core/services.yaml
@@ -57,7 +57,7 @@ services:
   # --- 邮件服务 ---
   - name: smtp
     cmd: bash /opt/micro_servers/smtp/_run.sh
-    args: []
+    args: ["--instance", "smtp", "--log-level", "info"]
     depends_on: []
     sleep_before: 2
 
diff --git a/smtp/log_client.py b/smtp/log_client.py
index 0dd516f..99fd6fc 100644
--- a/smtp/log_client.py
+++ b/smtp/log_client.py
@@ -38,6 +38,29 @@ _FLUSH_INTERVAL = 2.0    # 超时 2 秒强制 flush
 _TIMEOUT = 5             # socket 超时（秒）
 _QUEUE_MAXSIZE = 10000   # 队列上限，防止后台线程异常时内存无限增长；满则丢弃最旧条目
 
+# ── 日志级别过滤 ──
+_LOG_LEVELS = {
+    "debug": 0, "info": 1, "warn": 2, "warning": 2,
+    "error": 3, "critical": 4,
+}
+_LOG_LEVEL_THRESHOLD = _LOG_LEVELS["info"]  # 默认 info
+
+
+def _normalize_level(level):
+    """归一化级别名：大写转小写，warning→warn。"""
+    lv = (level or "info").lower()
+    if lv == "warning":
+        lv = "warn"
+    return lv
+
+
+def set_log_level(level):
+    """设置日志过滤阈值（低于该级别的日志将被丢弃）。"""
+    global _LOG_LEVEL_THRESHOLD
+    lv = _normalize_level(level)
+    if lv in _LOG_LEVELS:
+        _LOG_LEVEL_THRESHOLD = _LOG_LEVELS[lv]
+
 
 def _safe_json(obj):
     """安全序列化 extra 字段，不可序列化对象转为 repr 字符串，保证不抛异常。"""
@@ -77,6 +100,9 @@ class LogClient:
 
         队列满时静默丢弃最旧条目再放入新条目，保证不阻塞业务线程、不导致 OOM。
         """
+        # 级别过滤：低于当前阈值的日志直接丢弃（不进队列）
+        if _LOG_LEVELS.get(_normalize_level(level), 0) < _LOG_LEVEL_THRESHOLD:
+            return
         entry = {
             'ts': _now_iso(),  # 入队时即生成时间戳，反映真实事件时间
             'service': service,
diff --git a/smtp/smtp_v2.py b/smtp/smtp_v2.py
index a9b2f54..9d03e91 100644
--- a/smtp/smtp_v2.py
+++ b/smtp/smtp_v2.py
@@ -303,12 +303,23 @@ if __name__ == "__main__":
     import argparse
 
     parser = argparse.ArgumentParser(description="smtp — pymsg 邮箱验证码服务")
-    parser.add_argument("--addr", default="127.0.0.1", help="监听地址")
+    parser.add_argument("--addr", "--host", dest="addr", default="127.0.0.1",
+                        help="监听地址（--host 与 --addr 等价）")
     parser.add_argument("--port", type=int, default=8008, help="监听端口")
     parser.add_argument("--workers", type=int, default=4,
                         help="回调并发线程数（0=同步串行模式）")
+    parser.add_argument("--log-level", default="info",
+                        choices=["debug", "info", "warn", "error"],
+                        help="日志级别（默认 info）")
+    parser.add_argument("--instance", default="smtp",
+                        help="实例名（注册中心用，默认 smtp）")
     args = parser.parse_args()
 
+    # 应用日志级别过滤（低于阈值的日志不进队列）
+    logs.set_log_level(args.log_level)
+
+    print(f"[smtp] instance={args.instance} log-level={args.log_level}")
+    print(f"[smtp] 配置来源: .env / ENV > 默认值（SMTP 账号不通过 CLI 传递）")
     server = SmtpServer(args.addr, args.port, workers=args.workers)
     try:
         server.start()