我尝试将所有传入的电子邮件流量反向代理到 mailcow-dockerized通过 haproxy 在我的 debian 服务器中解决：
配置haproxy.cfg如下：
global
log /dev/log local0
log /dev/log local1 notice
chroot /var/lib/haproxy
stats socket /run/haproxy/admin.sock mode 660 level admin
stats timeout 30s
user haproxy
group haproxy
daemon
# Default SSL material locations
ca-base /etc/ssl/certs
crt-base /etc/ssl/private
# Default ciphers to use on SSL-enabled listening sockets.
# For more information, see ciphers(1SSL). This list is from:
# https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
ssl-default-bind-ciphers ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS
ssl-default-bind-options no-sslv3
defaults
log global
mode http
option httplog
option dontlognull
timeout connect 5000
timeout client 50000
timeout server 50000
errorfile 400 /etc/haproxy/errors/400.http
errorfile 403 /etc/haproxy/errors/403.http
errorfile 408 /etc/haproxy/errors/408.http
errorfile 500 /etc/haproxy/errors/500.http
errorfile 502 /etc/haproxy/errors/502.http
errorfile 503 /etc/haproxy/errors/503.http
errorfile 504 /etc/haproxy/errors/504.http
frontnend smtp
bind *:25
default_backend smtp_public
frontend submission
bind *:587
default_backend smtp_submission
frontend smtp_ssl
bind *:449
default_backend smtp_ssl
frontend pop3
bind *:995
default_backend pop3_
frontend imap
bind *:993
default_backend imap
backend smtp_public
mode tcp
option tcplog
server docker 127.0.0.1:2525 check
backend smtp_ssl
mode tcp
option tcplog
server docker 127.0.0.1:2465
backend smtp_submission
mode tcp
option tcplog
server docker 127.0.0.1:2587
backend pop3_
mode tcp
option tcplog
server docker 127.0.0.1:2995
backend imap
mode tcp
option tcplog
server docker 127.0.0.1:2993
正在运行的图像为：
ec79939443d4 mailcow/acme:1.3 "/srv/docker-entry..." 46 hours ago Up 46 hours
29c295d44767 mailcow/rspamd:1.1 "/docker-entrypoin..." 46 hours ago Up 46 hours
2d09fd009c39 nginx:mainline-alpine "/bin/sh -c 'envsu..." 46 hours ago Up 46 hours (healthy) 80/tcp, 0.0.0.0:8080->8080/tcp
a00d9477c464 mailcow/fail2ban:1.0 "python2 -u /logwa..." 46 hours ago Up 46 hours
6fdf54789459 mailcow/phpfpm:1.0 "/docker-entrypoin..." 46 hours ago Up 46 hours 9000/tcp
091d621123aa mailcow/sogo:1.0 "/bin/sh -c 'exec ..." 46 hours ago Up 46 hours
1028c60923a0 redis:alpine "docker-entrypoint..." 46 hours ago Up 46 hours 6379/tcp
827c20cee898 mailcow/dovecot:1.0 "/docker-entrypoin..." 46 hours ago Up 46 hours 24/tcp, 10001/tcp, 0.0.0.0:2110->110/tcp, 0.0.
76a977a8064e mailcow/postfix:1.0 "/bin/sh -c 'exec ..." 46 hours ago Up 46 hours 588/tcp, 0.0.0.0:2525->25/tcp, 0.0.0.0:2465->4
2299076f475f memcached:alpine "docker-entrypoint..." 46 hours ago Up 46 hours 11211/tcp
03b56dcc1563 mailcow/unbound:1.0 "/docker-entrypoin..." 46 hours ago Up 46 hours (healthy) 53/tcp, 53/udp
21f5a3673f3f mariadb:10.1 "docker-entrypoint..." 46 hours ago Up 46 hours (healthy) 3306/tcp
e2af96428a94 robbertkl/ipv6nat "/docker-ipv6nat -..." 46 hours ago Up 46 hours
97fcf9ad82ad mailcow/clamd:1.0 "/bootstrap.sh" 46 hours ago Up 46 hours 3310/tcp
但我收到以下错误：
Ιούλ 04 17:28:51 DockerMailserver haproxy[58310]: [ALERT] 184/172851 (58310) : Unable to use proxy 'imap' with wrong mode, required: http, has: tcp.
Ιούλ 04 17:28:51 DockerMailserver haproxy[58310]: [ALERT] 184/172851 (58310) : You may want to use 'mode http'.
Ιούλ 04 17:28:51 DockerMailserver haproxy[58310]: [ALERT] 184/172851 (58310) : Proxy 'imap': unable to find required default_backend: 'imap'.
Ιούλ 04 17:28:51 DockerMailserver haproxy[58310]: [ALERT] 184/172851 (58310) : Fatal errors found in configuration.
Ιούλ 04 17:28:51 DockerMailserver systemd[1]: haproxy.service holdoff time over, scheduling restart.
Ιούλ 04 17:28:51 DockerMailserver systemd[1]: Stopping HAProxy Load Balancer...
Ιούλ 04 17:28:51 DockerMailserver systemd[1]: Starting HAProxy Load Balancer...
Ιούλ 04 17:28:51 DockerMailserver systemd[1]: haproxy.service start request repeated too quickly, refusing to start.
Ιούλ 04 17:28:51 DockerMailserver systemd[1]: Failed to start HAProxy Load Balancer.
Ιούλ 04 17:28:51 DockerMailserver systemd[1]: Unit haproxy.service entered failed state.
你们知道如何修复这个错误吗？
答案1
根据文档，可以在所有部分（ 、、、 ）mode上设置。您有一个部分。这是否适用于未指定模式的部分？backendfrontenddefaultslistendefaultsmode httpfrontend
尝试指定mode tcp使用后端的前端mode tcp。