无聊试了一下nginx mail反向，

可惜没成功，放一个配置以后修改

user  nobody;
worker_processes  1;
error_log  logs/error.log  info;
pid        logs/nginx.pid;
 
events {
  worker_connections  1024;
  multi_accept on;
}
 
mail {
  auth_http  127.0.0.1:8181/auth;
  pop3_capabilities  "TOP"  "USER" "UIDL";
#  xclient off;
  imap_capabilities  "IMAP4rev1"  "UIDPLUS";
 
  server {
    listen     110;
    protocol   pop3;
    proxy      on;
  }
 
  server {
    listen     143;
    protocol   imap;
    proxy      on;
  }
  server {
    listen      25;
    protocol    smtp;
    smtp_auth   login plain;
    proxy       on;
  }

}

http {
        include mime.types;
        default_type application/octet-stream;
        server_tokens off;
        sendfile on;
        keepalive_timeout 65;

server
{
        listen 127.0.0.1:8181;
        server_name localhost;

        location /auth {
        add_header Auth-Status OK;
        add_header Auth-Server 127.0.0.1;
        add_header Auth-Port 25;
        add_header Auth-Pass $http_auth_pass;
        return 200;
        }
}
}