What IPs should be removed from the Policy Blocklist (PBL)?
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What IPs should be removed from the Policy Blocklist (PBL)?
IPs should only be removed from the Policy Blocklist (PBL) if:
- a mail server will be run on the IP
- appropriate forward (A record) and reverse DNS (rDNS) are set up for the IP
- port 25 outbound is closed for use by any device other than that mail server.