acl_smtp_connect:

    accept
        hosts = +trustedmailhosts
    accept
        condition = ${if match_ip{$sender_host_address}{iplsearch;/etc/trustedmailhosts}{1}{0}}
    accept
        hosts = +relay_hosts : +loopback
    accept
        hosts = +relay_hosts : +backupmx_hosts
    accept
        condition = ${if eq {$interface_port}{25}{no}{yes}}
    defer
        message = The server has reached its limit for processing requests from your host.  Please try again later.
        log_message = "Host is ratelimited ($sender_rate/$sender_rate_period max:$sender_rate_limit)"
        ratelimit = 1.2 / 1h / strict / per_conn / noupdate
   warn
        # host had a success in the last hour
        ratelimit = 1 / 1h / noupdate / per_conn / slow_fail_accept_$sender_host_address
        set acl_m4 = 1
   defer
        condition = ${if eq {${acl_m4}}{1}{0}{1}}
        log_message = "Host is ratelimited due to multiple failure only connections ($sender_rate/$sender_rate_period max:$sender_rate_limit)"
        ratelimit = 5 / 1h / noupdate / per_conn / slow_fail_block_$sender_host_address
drop
    message = Your host is not allowed to connect to this server.
    log_message = Host is banned
    hosts = +spammeripblocks

# do not change the comment in the line below, it is required for /usr/local/cpanel/bin/check_exim_config
#acl_smtp_notquit is required for this to work (exim 4.68)
    accept