frontend public_smtp
    bind    :::1025
    # Set the running mode or protocol of the instance
    # tcp    - The instance will work in pure TCP mode.
    # http   - The instance will work in HTTP mode.
    # health - The instance will work in "health" mode. It will just reply "OK" to incoming connections and close the conne
    mode    tcp
    # Enable logging of HTTP request, session state and timers
    option  tcplog
    default_backend bknd_cen060x64_smtp

backend bknd_cen060x64_smtp
    # Enable the statistics page
    stats enable
    stats uri /admin?stats
    stats realm Haproxy\ Statistics
    stats auth *****:*****
    stats refresh 5s
    # Set the running mode or protocol of the instance
    # tcp    - The instance will work in pure TCP mode.
    # http   - The instance will work in HTTP mode.
    # health - The instance will work in "health" mode. It will just reply "OK" to incoming connections and close the conne
    mode    tcp
    # Define the load balancing algorithm to be used in a backend
    balance leastconn
    retries 1
    stick           store-request src
    stick-table     type ip size 200k expire 30m
    server  host_cen060x64 10.41.0.58:20026 send-proxy

[...]

frontend public_smtp2
    bind    :::1125
    # Set the running mode or protocol of the instance
    # tcp    - The instance will work in pure TCP mode.
    # http   - The instance will work in HTTP mode.
    # health - The instance will work in "health" mode. It will just reply "OK" to incoming connections and close the conne
    mode    tcp
    # Enable logging of HTTP request, session state and timers
    option  tcplog
    default_backend bknd_cen060x64_smtp2

backend bknd_cen060x64_smtp2
    # Enable the statistics page
    stats enable
    stats uri /admin?stats
    stats realm Haproxy\ Statistics
    stats auth *****:*****
    stats refresh 5s
    # Set the running mode or protocol of the instance
    # tcp    - The instance will work in pure TCP mode.
    # http   - The instance will work in HTTP mode.
    # health - The instance will work in "health" mode. It will just reply "OK" to incoming connections and close the conne
    mode    tcp
    # Define the load balancing algorithm to be used in a backend
    balance leastconn
    retries 1
    stick           store-request src
    stick-table     type ip size 200k expire 30m
    server  host_cen060x64 10.41.0.58:25 no-send-proxy no-send-proxy-v2