diff --git a/config.yaml.example b/config.yaml.example
index 3e6de2c..454dba0 100644
--- a/config.yaml.example
+++ b/config.yaml.example
@@ -3,6 +3,7 @@ email_accounts:
     imap_port: 993
     username: "your_email@gmail.com"
     password: "your_app_password"
+    use_ssl: true
     smtp:
       server: "smtp.gmail.com"
       port: 465
@@ -12,6 +13,7 @@ email_accounts:
     imap_port: 993
     username: "your_email@126.com"
     password: "your_auth_code"
+    use_ssl: true
     smtp:
       server: "smtp.126.com"
       port: 465
diff --git a/src/config.py b/src/config.py
index 3ab4f45..4882dbb 100644
--- a/src/config.py
+++ b/src/config.py
@@ -17,6 +17,8 @@ class EmailAccount:
     imap_port: int
     username: str
     password: str
+    use_ssl: bool = True
+    use_starttls: bool = False
     smtp: Optional[SmtpConfig] = None
 
 
diff --git a/src/email_client.py b/src/email_client.py
index f193abc..12c6608 100644
--- a/src/email_client.py
+++ b/src/email_client.py
@@ -74,7 +74,12 @@ def _select_mailbox(conn, mailbox: str = "INBOX"):
 
 def _login_and_prepare(account: EmailAccount):
     logger.info("连接 %s:%d", account.imap_server, account.imap_port)
-    conn = imaplib.IMAP4_SSL(account.imap_server, account.imap_port)
+    if account.use_ssl:
+        conn = imaplib.IMAP4_SSL(account.imap_server, account.imap_port)
+    else:
+        conn = imaplib.IMAP4(account.imap_server, account.imap_port)
+        if account.use_starttls:
+            conn.starttls()
     conn.login(account.username, account.password)
     logger.info("登录成功: %s", account.username)
     if _check_provider(account.username, _PROVIDERS_NEED_ID):