haproxy config manual update for multiple ports

https://wiki2.dovecot.org/HAProxy

Maybe update this to having multiple ports (if this is even possible)

frontend ft_imap bind :110 << bind :143 mode tcp default_backend bk_imap

backend bk_imap mode tcp balance leastconn stick store-request src stick-table type ip size 200k expire 30m server s1 backend.example.com:10143 send-proxy-v2 <<< how to put more ports here?