diff --git a/douyu/config.py b/douyu/config.py
index 4c5b61e..2f8d379 100644
--- a/douyu/config.py
+++ b/douyu/config.py
@@ -5,6 +5,8 @@ from pathlib import Path
 from dataclasses import dataclass
 from typing import List, Optional
 
+from .email_verifier import get_email_config_for_account
+
 
 @dataclass
 class Account:
@@ -45,13 +47,14 @@ class Config:
         """获取账号列表"""
         accounts = []
         for acc in self._config.get('accounts', []):
+            email_config = get_email_config_for_account(acc['email'])
             accounts.append(Account(
                 username=acc['username'],
                 password=acc['password'],
                 email=acc['email'],
                 email_password=acc['email_password'],
-                email_imap_server=acc.get('email_imap_server', ''),
-                email_imap_port=acc.get('email_imap_port', 993),
+                email_imap_server=acc.get('email_imap_server') or email_config['server'],
+                email_imap_port=acc.get('email_imap_port') or email_config['port'],
             ))
         return accounts
 
diff --git a/douyu/email_verifier.py b/douyu/email_verifier.py
index 8db645b..d7ae3a6 100644
--- a/douyu/email_verifier.py
+++ b/douyu/email_verifier.py
@@ -40,6 +40,7 @@ class EmailVerifier:
         """连接IMAP服务器"""
         try:
             logger.info(f"连接IMAP服务器: {self.imap_server}:{self.imap_port}")
+            self._validate_login_text()
             self._connection = imaplib.IMAP4_SSL(
                 self.imap_server,
                 self.imap_port,
@@ -51,6 +52,17 @@ class EmailVerifier:
             logger.error(f"IMAP连接失败: {e}")
             raise
 
+    def _validate_login_text(self) -> None:
+        """提前检查IMAP登录字段，给出比ascii编码异常更明确的提示。"""
+        for label, value in (("邮箱账号", self.username), ("邮箱密码/授权码", self.password)):
+            try:
+                value.encode("ascii")
+            except UnicodeEncodeError as exc:
+                raise ValueError(
+                    f"{label}包含中文或其他非ASCII字符，IMAP无法登录；"
+                    "请检查导入格式是否为：用户名|密码|邮箱|邮箱密码"
+                ) from exc
+
     def disconnect(self) -> None:
         """断开IMAP连接"""
         if self._connection:
@@ -324,6 +336,7 @@ class EmailVerifier:
 def get_email_config_for_account(email_address: str) -> dict:
     """根据邮箱地址自动配置IMAP服务器"""
     configs = {
+        'bdhg.xyz': {'server': 'mail.bdhg.xyz', 'port': 993},
         'qq.com': {'server': 'imap.qq.com', 'port': 993},
         '163.com': {'server': 'imap.163.com', 'port': 993},
         '126.com': {'server': 'imap.126.com', 'port': 993},
diff --git a/gui/app.py b/gui/app.py
index f8629d7..f9eb4cf 100644
--- a/gui/app.py
+++ b/gui/app.py
@@ -9,11 +9,26 @@ from pathlib import Path
 from queue import Queue, Empty
 from typing import List
 
+from loguru import logger
+
 from douyu.config import Account, ProxyConfig
+from utils import setup_logger
 from .login_worker import LoginWorker, parse_accounts_text
 from .widgets import AccountTable, LogPanel
 
 
+LOG_LEVELS = ('DEBUG', 'INFO', 'WARNING', 'ERROR')
+LOG_LEVEL_TAGS = {
+    'TRACE': 'debug',
+    'DEBUG': 'debug',
+    'INFO': 'info',
+    'SUCCESS': 'success',
+    'WARNING': 'warning',
+    'ERROR': 'error',
+    'CRITICAL': 'error',
+}
+
+
 class DouyuLoginApp:
     """斗鱼批量登录GUI应用"""
 
@@ -31,6 +46,8 @@ class DouyuLoginApp:
         # 加载配置
         self.proxy_config = self._load_proxy_config()
         self.geetest_retries = self._load_geetest_retries()
+        self.log_level = self._load_log_level()
+        self._configure_logging(self.log_level)
 
         # 创建主窗口
         self.root = tk.Tk()
@@ -77,6 +94,45 @@ class DouyuLoginApp:
         except:
             return 5
 
+    def _load_log_level(self) -> str:
+        """从配置文件加载默认日志等级。"""
+        try:
+            import yaml
+            with open(self.config_path, 'r', encoding='utf-8') as f:
+                config = yaml.safe_load(f)
+                level = config.get('log', {}).get('level', 'INFO').upper()
+                return level if level in LOG_LEVELS else 'INFO'
+        except:
+            return 'INFO'
+
+    def _configure_logging(self, level: str) -> None:
+        """配置终端和GUI日志输出等级。"""
+        self.log_level = level if level in LOG_LEVELS else 'INFO'
+        setup_logger(level=self.log_level)
+        logger.add(
+            self._enqueue_log_record,
+            level=self.log_level,
+            format='{message}',
+            colorize=False,
+        )
+
+    def _enqueue_log_record(self, message) -> None:
+        """把loguru日志转发到GUI日志队列。"""
+        record = message.record
+        level = record['level'].name
+        tag = LOG_LEVEL_TAGS.get(level, 'info')
+        text = (
+            f"{record['name']}:{record['function']}:{record['line']} | "
+            f"{record['message']}"
+        )
+        self.log_queue.put((tag, text))
+
+    def _on_log_level_change(self, _event=None) -> None:
+        """切换日志等级。"""
+        level = self.log_level_var.get().upper()
+        self._configure_logging(level)
+        self.log_panel.append_log('info', f'日志等级已切换为: {level}')
+
     def _create_ui(self):
         """创建用户界面"""
         # 主容器
@@ -163,9 +219,13 @@ class DouyuLoginApp:
         self.proxy_https_entry = ttk.Entry(static_frame, textvariable=self.proxy_https_var, width=20)
         self.proxy_https_entry.pack(side='left', padx=(5, 0))
 
+        # 右侧配置：极验和日志
+        side_frame = ttk.Frame(config_frame)
+        side_frame.pack(side='right', fill='y', padx=(5, 0))
+
         # 极验配置
-        geetest_frame = ttk.LabelFrame(config_frame, text='极验配置', padding=10)
-        geetest_frame.pack(side='right', fill='y', padx=(5, 0))
+        geetest_frame = ttk.LabelFrame(side_frame, text='极验配置', padding=10)
+        geetest_frame.pack(fill='x')
 
         ttk.Label(geetest_frame, text='最大重试:').pack(anchor='w')
         self.geetest_retries_var = tk.IntVar(value=self.geetest_retries)
@@ -173,6 +233,22 @@ class DouyuLoginApp:
                                    textvariable=self.geetest_retries_var)
         retries_spin.pack(anchor='w', pady=(5, 0))
 
+        # 日志配置
+        log_frame = ttk.LabelFrame(side_frame, text='日志配置', padding=10)
+        log_frame.pack(fill='x', pady=(8, 0))
+
+        ttk.Label(log_frame, text='等级:').pack(anchor='w')
+        self.log_level_var = tk.StringVar(value=self.log_level)
+        log_level_combo = ttk.Combobox(
+            log_frame,
+            values=LOG_LEVELS,
+            textvariable=self.log_level_var,
+            state='readonly',
+            width=10,
+        )
+        log_level_combo.pack(anchor='w', pady=(5, 0))
+        log_level_combo.bind('<<ComboboxSelected>>', self._on_log_level_change)
+
         # 初始状态
         self._on_proxy_toggle()
 
@@ -333,6 +409,8 @@ class DouyuLoginApp:
         # 获取当前GUI配置
         proxy_config = self._get_proxy_config()
         geetest_retries = self.geetest_retries_var.get()
+        log_level = self.log_level_var.get().upper()
+        self._configure_logging(log_level)
 
         # 验证代理配置
         if proxy_config.enabled:
@@ -366,6 +444,7 @@ class DouyuLoginApp:
             self.log_panel.append_log('info', '未使用代理')
 
         self.log_panel.append_log('info', f'极验最大重试: {geetest_retries} 次')
+        self.log_panel.append_log('info', f'日志等级: {log_level}')
         self.progress_var.set('登录中...')
 
         # 启动登录线程
diff --git a/gui/login_worker.py b/gui/login_worker.py
index c0be273..79ba3cb 100644
--- a/gui/login_worker.py
+++ b/gui/login_worker.py
@@ -1,5 +1,6 @@
 """登录工作线程模块"""
 
+import re
 import threading
 import time
 from queue import Queue
@@ -8,33 +9,31 @@ from loguru import logger
 
 from douyu import DouyuLogin
 from douyu.config import Account, ProxyConfig
+from douyu.email_verifier import get_email_config_for_account
 
 
-# IMAP服务器映射
-IMAP_SERVERS = {
-    'qq.com': 'imap.qq.com',
-    '163.com': 'imap.163.com',
-    '126.com': 'imap.126.com',
-    'gmail.com': 'imap.gmail.com',
-    'outlook.com': 'outlook.office365.com',
-    'hotmail.com': 'outlook.office365.com',
-    'yeah.net': 'imap.yeah.net',
-    'sohu.com': 'imap.sohu.com',
-    'sina.com': 'imap.sina.com',
-}
+EMAIL_PATTERN = re.compile(r'^[^\s@|]+@[^\s@|]+\.[^\s@|]+$')
 
 
 def get_imap_server(email: str) -> str:
     """从邮箱地址推导IMAP服务器"""
-    domain = email.split('@')[-1].lower()
-    return IMAP_SERVERS.get(domain, f'imap.{domain}')
+    return get_email_config_for_account(email)['server']
+
+
+def _is_ascii(value: str) -> bool:
+    """检查字符串是否为ASCII。"""
+    try:
+        value.encode('ascii')
+        return True
+    except UnicodeEncodeError:
+        return False
 
 
 def parse_accounts_text(text: str) -> list[Account]:
     """
     解析账号文本
 
-    格式：用户名|密码|邮箱|邮箱密码（每行一个）
+    格式：用户名|密码|邮箱|邮箱密码
 
     Returns:
         Account列表
@@ -47,7 +46,7 @@ def parse_accounts_text(text: str) -> list[Account]:
             continue
 
         parts = line.split('|')
-        if len(parts) < 4:
+        if len(parts) != 4:
             logger.warning(f"第{line_num}行格式错误，需要4个字段，实际{len(parts)}个: {line}")
             continue
 
@@ -57,6 +56,17 @@ def parse_accounts_text(text: str) -> list[Account]:
             logger.warning(f"第{line_num}行存在空字段: {line}")
             continue
 
+        if not EMAIL_PATTERN.match(email) or not _is_ascii(email):
+            logger.warning(
+                f"第{line_num}行邮箱格式不正确: {email}，"
+                "请确认格式为：用户名|密码|邮箱|邮箱密码"
+            )
+            continue
+
+        if not _is_ascii(email_password):
+            logger.warning(f"第{line_num}行邮箱密码/授权码包含非ASCII字符，IMAP可能无法登录")
+            continue
+
         accounts.append(Account(
             username=username,
             password=password,