> What do you mean about "flood controls"? If I remember correctly, it is one of the possible side effects of Auto Deny Possible Hack Attempts, an IMail setting. It is not really what it is intended for, but it is what it can do.
Long lists of recipients, or other long headers, will trigger a "do not accept mail from this IP" state to be enabled, and you have to restart IMail's smtp service to clear it. I am trying to remember if there was another setting in the 7.x series that had a similar side effect. Nothing comes to mind at this time. The "Deny <> sender" setting will cause issues, but that is not a flooding type of thing. None of the new settings seems to change the operation between IMail and the IMGate, so basically if you are used to 7.x, you should see little change. --Eric
