I am about to create a new tagging key for the first time in the Bounce Verification settings of our IronPort C350 and i'm wondering if anyone could advise on a few things please.
1) Should the tagging key have some degree of complexity?
2) Is there a need/recommendation to change the tagging key at intervals?
3) If i was to change the tagging key on the device, and subsequently delete the old one, what would happen to any bounce verifications that were 'tagged' with the old key? Would they be rejected or are the old keys remembered in some way by the IronPort device for a period of time?
Many thanks for you help