diff --git a/unipay/providers/transfer.py b/unipay/providers/transfer.py
index caaee52..14f4d45 100644
--- a/unipay/providers/transfer.py
+++ b/unipay/providers/transfer.py
@@ -154,20 +154,33 @@ class TransferGateway(Gateway):
 
 	async def run(self, app):
 		"""后台轮询邮箱，匹配转账码并完成充值入账"""
-		debug(f'mail check loop will starting')
+		from datetime import datetime, timedelta
+		from email.utils import parsedate_to_datetime
+		debug('mail check loop starting')
 		self.running = True
-		return
 		while self.running:
-			debug(f'mail check loop running')
+			debug('mail check loop running')
 			try:
 				ec = EmailClient(self.pop3server, self.email, self.password)
 				count, _ = ec.stat()
 				if count == 0:
 					await asyncio.sleep(30)
 					continue
+				cutoff = datetime.now() - timedelta(days=2)
 				for i in range(count, 0, -1):
 					try:
 						mail = ec.get_mail(i)
+
+						mail_date_str = getattr(mail, 'date', None)
+						if mail_date_str:
+							try:
+								mail_date = parsedate_to_datetime(mail_date_str)
+								if mail_date < cutoff:
+									continue
+							except:
+								continue
+						else:
+							continue
 						if mail.mailfrom != '95555@message.cmbchina.com':
 							debug(f'ignored mail from {mail.mailfrom=}')
 							continue
@@ -258,10 +271,13 @@ class TransferGateway(Gateway):
 						mail_date = parsedate_to_datetime(mail_date_str)
 						if mail_date < cutoff:
 							skip_date = True
-					except:
-						pass
+					except Exception as de:
+						debug('mail[' + idx + '] date parse error: ' + str(mail_date_str) + ' -> ' + str(de))
+				else:
+					debug('mail[' + idx + '] no date header, skipping date filter')
+					skip_date = True  # 没有日期头的邮件跳过
 				if skip_date:
-					debug('mail[' + idx + '] date=' + str(mail_date_str) + ' older than 2 days, skip')
+					debug('mail[' + idx + '] date=' + str(mail_date_str) + ' older than 2 days or no date, skip')
 					continue
 
 				from_addr = getattr(mail, 'mailfrom', '?')