diff --git a/README.md b/README.md
index 13f5dc8..45b3147 100644
--- a/README.md
+++ b/README.md
@@ -158,6 +158,7 @@ cp config.example.json config.json
 - `defaultDomains`：Cloudflare 等 catch-all 域名，用于生成注册邮箱
 - 验证码实际进入 Gmail；用 **应用专用密码**，不是登录密码
 - 也可把账号密码只写在 `.env` 的 `GMAIL_USER` / `GMAIL_PASSWORD`
+- 取到验证码后默认 **删除该邮件**（`gmail_delete_after_code: true`），避免 catch-all 邮箱堆积；失败不影响注册
 
 #### B. Hotmail / Outlook
 
diff --git a/config.example.json b/config.example.json
index 974b13f..15efce4 100644
--- a/config.example.json
+++ b/config.example.json
@@ -186,5 +186,9 @@
   "// gmail_imap_password": "Gmail 应用专用密码（非登录密码）",
   "gmail_imap_password": "",
   "gmail_imap_host": "imap.gmail.com",
-  "gmail_imap_port": 993
+  "gmail_imap_port": 993,
+  "// gmail_delete_after_code": "Gmail 取到验证码后是否 IMAP 删除该邮件（失败不影响注册）",
+  "gmail_delete_after_code": true,
+  "// hotmail_delete_after_code": "Hotmail/Outlook 取到验证码后是否 IMAP 删除该邮件",
+  "hotmail_delete_after_code": true
 }
diff --git a/grok_register_ttk.py b/grok_register_ttk.py
index b48b808..7b6352d 100644
--- a/grok_register_ttk.py
+++ b/grok_register_ttk.py
@@ -1730,6 +1730,18 @@ def _hotmail_imap_get_code(mailbox_email, target_email, access_token, log_callba
             if code:
                 if log_callback:
                     log_callback(f"[*] Hotmail/Outlook 从邮件中提取到验证码: {code}")
+                if _config_bool(config.get("hotmail_delete_after_code", True), default=True):
+                    try:
+                        imap.store(mid, "+FLAGS", r"(\Deleted)")
+                        try:
+                            imap.expunge()
+                        except Exception:
+                            pass
+                        if log_callback:
+                            log_callback(f"[*] Hotmail/Outlook 已删除验证码邮件 mid={mid!r}")
+                    except Exception as del_exc:
+                        if log_callback:
+                            log_callback(f"[Debug] Hotmail/Outlook 删除验证码邮件失败: {del_exc}")
                 return code
         return None
     finally:
@@ -1856,6 +1868,7 @@ def gmail_get_oai_code(
         raise Exception("Gmail IMAP 未配置：需要在 config.json 设置 gmail_imap_user/gmail_imap_password，或环境变量 GMAIL_USER/GMAIL_PASSWORD")
     imap_host = str(config.get("gmail_imap_host", "imap.gmail.com") or "imap.gmail.com").strip()
     imap_port = int(config.get("gmail_imap_port", 993) or 993)
+    delete_after = _config_bool(config.get("gmail_delete_after_code", True), default=True)
     deadline = time.time() + timeout
     # Resend earlier: first mail often arrives in 5-40s; resend at 45s as safety net.
     next_resend_at = time.time() + float(config.get("gmail_resend_after_sec", 45) or 45)
@@ -1927,6 +1940,22 @@ def gmail_get_oai_code(
         )
         return subject, sender, recipient_blob
 
+    def _delete_message(conn, mid, code: str) -> None:
+        """Best-effort delete of used verification mail; never blocks returning the code."""
+        if not delete_after or conn is None or mid is None:
+            return
+        try:
+            conn.store(mid, "+FLAGS", r"(\Deleted)")
+            try:
+                conn.expunge()
+            except Exception:
+                pass
+            if log_callback:
+                log_callback(f"[*] Gmail IMAP 已删除验证码邮件 mid={mid!r} code={code}")
+        except Exception as exc:
+            if log_callback:
+                log_callback(f"[Debug] Gmail IMAP 删除验证码邮件失败: {exc}")
+
     try:
         while time.time() < deadline:
             raise_if_cancelled(cancel_callback)
@@ -1989,6 +2018,7 @@ def gmail_get_oai_code(
                                 f"[*] Gmail IMAP 从邮件中提取到验证码: {code} "
                                 f"(elapsed={elapsed:.1f}s polls={poll_n} via={qused or 'ALL'})"
                             )
+                        _delete_message(conn, mid, code)
                         return code
                     # Rare: code only in body — fetch full message once
                     try:
@@ -2009,6 +2039,7 @@ def gmail_get_oai_code(
                                     f"[*] Gmail IMAP 从邮件正文提取到验证码: {code} "
                                     f"(elapsed={elapsed:.1f}s polls={poll_n})"
                                 )
+                            _delete_message(conn, mid, code)
                             return code
             except Exception as exc:
                 _close_imap(imap)