如何配置邮政邮件服务器从网站的子文件夹而不是主域或子域访问它？

Question

我正在运行Ubuntu 18.04.5，Nginx，Webinoly CP。看来Postal的安装还可以，但是因为我是一个初学者，所以我没有正确配置Postal config文件，因此我可以使用所需的任何路径来访问它。主要域名需要用于我的网站，我想将Postal放在domain.com/postal之类的东西上，而不是放在domain.com甚至postal.domain.com上。

我认为有两个文件相关。见下文：

nano /opt/postal/config/postal.yml

<foreach item="item" separator="," collection="raffleDataList">
        <![CDATA[
        (
            #{item.raffleNo},               #{item.storeNo},        #{item.storeId},    #{item.favoriteArea},       #{item.modelId},
            #{item.size},                   #{item.personName},     #{item.personId},   #{item.createDate_join1},   #{item.createDate_join2},
            #{item.createDate_web_join},    #{item.email},          #{item.birthDate},  #{item.isOut},              #{item.address},
            #{item.creator},                NOW(),                  false,
            #{item.randomNo},               #{item.rank2},          #{item.fileNo}
        )
        ]]>

sudo nano /etc/nginx/conf.d/postal.ichangemydomain.com.conf

web:
  # The host that the management interface will be available on
  host: postal.ichangemydomain.com
  # The protocol that requests to the management interface should happen on
  protocol: https

fast_server:
  # This can be enabled to enable click & open tracking on emails. It is disabl$
  # default as it requires a separate static IP address on your server.
  enabled: false
  bind_address:

general:
  # This can be changed to allow messages to be sent from multiple IP addresses
  use_ip_pools: false

main_db:
  # Specify the connection details for your MySQL database
  host: 127.0.0.1
  username: postal
  password: password
  database: postal

message_db:
  # Specify the connection details for your MySQL server that will be house the
  # message databases for mail servers.
  host: 127.0.0.1
  username: postal
  password: password
  prefix: postal

rabbitmq:
  # Specify the connection details for your RabbitMQ server.
  host: 127.0.0.1
  username: postal
  password: password
  vhost: /postal

dns:
  # Specifies the DNS record that you have configured. Refer to the documentati$
  # https://github.com/atech/postal/wiki/Domains-&-DNS-Configuration for further
  # information about these.
  mx_records:
    - mx.postal.ichangemydomain.com
  smtp_server_hostname: postal.ichangemydomain.com
  spf_include: spf.postal.ichangemydomain.com
  return_path: rp.postal.ichangemydomain.com
  route_domain: routes.postal.ichangemydomain.com
  track_domain: track.postal.ichangemydomain.com

smtp:
  # Specify an SMTP server that can be used to send messages from the Postal ma$
  # system to users. You can configure this to use a Postal mail server once the
  # your installation has been set up.
  host: 127.0.0.1
  port: 2525
  username: # Complete when Postal is running and you can
  password: # generate the credentials within the interface.
  from_name: Postal
  from_address: postal@yourdomain.com

rails:
  # This is generated automatically by the config initialization. It should be $
  # string unique to your installation.
  secret_key: 3265da9dfgjsjsaa422fb32flkjn45lk2j3c4b3fciwe78qdfy8qwe9rf