[Jay_D]

Thanks all for your reply.

I sometimes prefer limits because this always works. If you have http and smtp going at the same time, then Floodgate doesn't seem to give more bandwidth to http. It's as if some time has is needed to lower the bandwidth for smtp but by the time that's done, the http requests is no longer needed.
Maybe weights are good for traffic that take some time like a download/upload more for those spikes like normal browsing, I don't think it works very well.

I always limit smtp as this eats bandwidth and nobody cares if a mail arrives in 1 second or 10 minutes, as long as it arrives.