Which of the following retains the information it's storing when the system power is turned off?

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Hi everyone,

So I'm fresh to reviewing the spam solutions we have at my employer. I see spam getting through to inboxes, yet when I check the IP it came from it is on a blacklist like Spamhaus or CBL or SpamCop, etc.

When I run the Test-IPBlockListProviders cmdlet it shows the expected responses for a known IP on a block list. This would tell me that the Exchange server can properly communicate with the implemented IP Block List Providers.

So my question is this... if it looks like it's able to talk to the Block List Providers alright without errors, why is the email getting through to the recipient despite it being on a blocklist? Is there some other setting I've missed? I feel this is a simple solution, something I've overlooked.

My understanding was the IP Block List was used to block emails before being delivered. I'm unaware of overrides or anything else that might need to be set in order for it to work. The feature is enabled in the Hub Transport --> Anti-Spam section and so are the individual providers listed on the feature.

We are on Exchange 2007 SP3.