feat: add daily request limit and refactor access control (#759)

- Add daily request limit per IP in blacklist settings (1-1,000,000/day)
- Refactor access control logic: merge blacklist and rate limit checks
- Remove RATE_LIMIT_API_DAILY_REQUESTS env var, use database config instead
- Move x-custom-auth check earlier in middleware chain
- Add comprehensive English documentation (31 new guide pages)
- Improve code structure and error handling

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Claude <noreply@anthropic.com>

vitepress-docs/docs/en/guide/feature/config-smtp-proxy.md

@@ -0,0 +1,60 @@
+# Setting Up SMTP IMAP Proxy Service
+
+::: warning Notice
+If you are using `resend`, you can directly use `resend`'s `SMTP` service without needing this service
+:::
+
+## Why Do You Need SMTP IMAP Proxy Service
+
+`SMTP` and `IMAP` have a wider range of application scenarios
+
+## How to Set Up SMTP IMAP Proxy Service
+
+### Local Run
+
+```bash
+cd smtp_proxy_server/
+# Copy configuration file and modify it
+# Your worker address, proxy_url=https://temp-email-api.xxx.xxx
+# Your SMTP service port, port=8025
+cp .env.example .env
+python3 -m venv venv
+./venv/bin/python3 -m pip install -r requirements.txt
+./venv/bin/python3 main.py
+```
+
+### Docker Run
+
+```bash
+cd smtp_proxy_server/
+docker-compose up -d
+```
+
+Modify the environment variables in docker-compose.yaml, note to choose the appropriate `tag`
+
+`proxy_url` is the URL address of the `worker`
+
+```yaml
+services:
+  smtp_proxy_server:
+    image: ghcr.io/dreamhunter2333/cloudflare_temp_email/smtp_proxy_server:latest
+    # build:
+    #   context: .
+    #   dockerfile: dockerfile
+    container_name: "smtp_proxy_server"
+    ports:
+      - "8025:8025"
+      - "11143:11143"
+    environment:
+      - proxy_url=https://temp-email-api.xxx.xxx
+      - port=8025
+      - imap_port=11143
+```
+
+## Using Thunderbird to Login
+
+Download [Thunderbird](https://www.thunderbird.net/en-US/)
+
+For password, enter the `email address credential`
+
+![imap](/feature/imap.png)