When enabled flood control safeguards your system from being flooded with tickets from the same user or same ticket. Flood control is a preventative measure against ticket flooding or inbox flooding through email parsing.
The following are conditions under in which tickets are removed:
1) If the same message source was sent on the same day within an hour.
2) If the same message contents and subject was sent on the same day within an hour.
3) If more than 3 tickets/posts are submitted by the same email address in less than a minute.
If an email matches any of the above criteria it is not processed but is instead deleted. To enable flood control on your help desk go to General Settings under the Settings menu. Scroll down to Site Options and select Enable Ticket Flood Control.
