Mail Flow Scanning
Inbound mail will get scanned in the below order, and may get rejected at the first stage.
- Proofpoint Dynamic IP reputation (PDR) check and Cloudmark Sender Intelligence (CSI) check
- Service level DNS checks
- Anti-virus check
- Attachment Defense check (if licensed)
- Anti-spoofing check
- Customized filter checks (see next section)
- Spam engine check
- URL Defense modification
PDR Rejection
The Proofpoint Dynamic Reputation service is our proprietary block list. IP owners can review
the PDR listing and removal KB for further information. Proofpoint will bounce messages indicating blocked by prs.proofpoint.com.
Custom Filter List Order Of Operations
The custom filter list is based upon both Sender Lists and a Filter created. This goes in the top down order in the table below:
Filter Order
In the filter page, filters are prioritized by a top-down selection in itself.
Scope Order
In filter order in the table below, it should be noted that the hierarchy of similar filter type goes:
- End-user has highest priority
- Group has middle priority
- Organization has lowest priority
Order Number | Type | Scope | Action | Entry action | 1 | Filter | End-User | N\A | N\A | 2 | Filter | Group | N\A | N\A | 3 | Filter | Organization | N\A | N\A | 4 | Sender List | End-User | Block | IP Address |
5 | Sender List | End-User | Safe | IP Address | 6 | Sender list | End-User | Block | SMTP Address | 7 | Sender list | End-User | Safe | SMTP Address | 8 | Sender list | End-User | Block | Domain | 9 | Sender list | End-User | Safe | Domain | 10 | Sender list | End-User | Block | Wildcard Domain | 11 | Sender list | End-User | Safe | Wildcard Domain | 12 | Sender list | End-User | Block | Wildcard IP | 13 | Sender list | End-User | Safe | Wildcard IP | 14 | Sender list | End-User | Block | CIDR | 15 | Sender list | End-User | Safe | CIDR | 16 | Sender list | Group | Block | IP Address | 17 | Sender list | Group | Safe | IP Address |
18 | Sender list | Group | Block | SMTP Address | 19 | Sender list | Group | Safe | SMTP Address | 20 | Sender list | Group | Block | Domain | 21 | Sender list | Group | Safe | Domain | 22 | Sender list | Group | Block | Wildcard Domain | 23 | Sender list | Group | Safe | Wildcard Domain | 24 | Sender list | Group | Block | Wildcard IP | 25 | Sender list | Organization | Safe | Wildcard IP | 26 | Sender list | Organization | Block | CIDR | 27 | Sender list | Organization | Safe | CIDR | 28 | Sender list | Organization | Block | IP Address | 29 | Sender list | Organization | Safe | IP Address | 30 | Sender list | Organization | Block | SMTP Address |
31 | Sender list | Organization | Safe | SMTP Address | 32 | Sender list | Organization | Block | Domain | 33 | Sender list | Organization | Safe | Domain | 34 | Sender list | Organization | Block | Wildcard Domain | 35 | Sender list | Organization | Safe | Wildcard Domain | 36 | Sender list | Organization | Block | Wildcard IP | 37 | Sender list | Organization | Safe | Wildcard IP | 38 | Sender list | Organization | Block | CIDR | 39 | Sender list | Organization | Safe | CIDR |
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