Currently we can allow and block email by a specific address or by a domain. But I have a client who I just migrated over to you guys that previously was able to allow and block by IP address. He had several IPs blocked because they were being used to spoof legitimate domains. Currently he doesn't have a way to protect himself against those. He can hit some of them by using the country filter, but some of the IPs were in the US, so he can't hit all of them.
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