Bug: When I'm using docker-compose, After I put smtp service under the traefik, and I'm using the `proxyProtocol`, The connection will breke

Here is the traefik code:
```
tcp:
routers:
smtp_router:
entryPoints:
- smtp
rule: "HostSNI(`*`)"
service: smtp_service
services:
smtp_service:
loadBalancer:
servers:
- address: weloveparty_account_auth_service:25
proxyProtocol:
version: 2
terminationDelay: 200
```

https://traefik.io/blog/announcing-traefik-2-4/#:~:text=However%2C%20when%20forwarding-,SMTP%20connections,-to%20a%20service