How to correctly use the Policy Block List (PBL)
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How to correctly use the Policy Block List (PBL)
The best way to use the Policy Block List (PBL) is at the mail server as part of the Spamhaus Zen zone, during the realtime SMTP session. The composite Zen zone is designed to work most effectively for most networks as a complete system.
- Zen contains the SBL, SBLCSS, XBL and PBL blocklists.
- Connections from IP addresses listed in Zen can safely be rejected during the SMTP transaction.
- PBL should only be used for SMTP (email).
- Please see the DNSBL Usage FAQ for general information on using Spamhaus DNSBL zones.
NOTE:
PBL is included in Zen: Zen should not be applied to filtering decisions where PBL would not make sense, unless your application can distinguish between specific Zen return codes. PBL is designed to check only the connecting IP address during a SMTP transaction.