I have configured the HAproxy as per below configuration. using Iredmail documentation for testing purpose.

global
        log 127.0.0.1   local0
        log 127.0.0.1   local1 debug
        ssl-default-bind-options no-sslv3
        tune.ssl.default-dh-param 2048
        maxconn   45000 # Total Max Connections.
        daemon
       
defaults
        timeout server 86400000
        timeout connect 86400000
        timeout client 86400000
        timeout queue   1000s

listen premierdis-http
        bind 192.168.5.10:80
        mode http
        redirect scheme https if !{ ssl_fc }
listen premierdis
        bind 192.168.5.10:443 ssl crt /etc/ssl/iredmail.org/jhelum.co.pem
        mode http
        stats enable
        stats uri /haproxy?stats
        stats realm STATS
        stats auth user:pass
        balance source
        option http-server-close
        timeout http-keep-alive 3000
        http-request del-header ^X-Real-IP:
        option forwardfor header X-Real-IP
        http-request add-header X-Forwarded-Proto https
        server ha-mail1 192.168.5.1:80 check
        server ha-mail2 192.168.5.2:80 check
frontend ft_http
        bind :80
        mode http
        default_backend bk_http
frontend ft_https
        bind :443 ssl crt /etc/ssl/iredmail.org/jhelum.co.pem
        mode tcp
        default_backend bk_https
backend bk_http
        mode http
        balance roundrobin
        stick on src table bk_https
        default-server inter 1s
        server ha-mail1 192.168.5.1:80 check id 1
        server ha-mail2 192.168.5.2:80 check id 2
backend bk_https
        mode tcp
        balance roundrobin
        stick-table type ip size 200k expire 30m
        stick on src
        default-server inter 1s
        server ha-mail1 192.168.5.1:443 check id 1
        server ha-mail2 192.168.5.2:443 check id 2
# Reporting
listen stats
    bind :9000
    mode http

# Enable statistics
    stats enable

   # Hide HAPRoxy version, a necessity for any public-facing site
    stats hide-version

    # Show text in authentication popup
    stats realm Authorization

    # URI of the stats page: localhost:9000/haproxy_stats
    stats uri /haproxy_stats

    # Set a username and password
    stats auth user:user password

When we start HAproxy service it shows below error because Nginx is also using same ports.

[ALERT]    (122326) : Binding [/etc/haproxy/haproxy.cfg:16] for proxy premierdis-http: cannot bind socket (Address already in use) for [192.168.5.10:80]
[ALERT]    (122326) : Binding [/etc/haproxy/haproxy.cfg:35] for frontend ft_http: cannot bind socket (Address already in use) for [0.0.0.0:80]
[ALERT]    (122326) : Binding [/etc/haproxy/haproxy.cfg:39] for frontend ft_https: cannot bind socket (Address already in use) for [0.0.0.0:443]

I need assistance on resolving this issue so both HAproxy and Nyngix service start and I can open mail on browser through virtual IP. I am not able to figure out what changes to be done on iredmail.