feat: IMAP 支持 SSL/STARTTLS 配置

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
 
 

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):