This is our current sender group order. Does it make sense?Internal machines that are allowed to relay through IronPort WHITELIST: TRUSTED Trusted senders have no Brightmail or rate limiting ManualBlock: BLOCKED manual blocks, and really b...
Kinda -- we have a problem with tons of NDRs coming in from Phishing expeditions. The sheer volume was overloading brightmail, even though the vast number of returns were to non-existent email addresses on our side, sent from respectable domains. Wh...