mailcow/src/mailcow-dockerized/data/conf/rspamd/override.d/ratelimit.conf

rates {
    # Format: "1 / 1h" or "20 / 1m" etc. - global ratelimits are disabled by default
    to = "100 / 1s";
    to_ip = "100 / 1s";
    to_ip_from = "100 / 1s";
    bounce_to = "100 / 1h";
    bounce_to_ip = "7 / 1m";
}
whitelisted_rcpts = "postmaster,mailer-daemon";
max_rcpt = 25;
custom_keywords = "/etc/rspamd/lua/ratelimit.lua";
info_symbol = "RATELIMITED";