ePrism User Guide - EdgeWave

ePrism Overview
Malformed Content, Virus Checking, and Attachment Control
Messages are scanned for malformed messages, viruses, and specific attachments. If there is a
problem, ePrism can be configured with a variety of actions, such as sending the message to a
Quarantine folder.
OCF (Objectionable Content Filter)
Messages are scanned for objectionable content and a configurable action is taken.
Pattern Based Message Filters and Specific Access Patterns
The messages are scanned to see if they match any existing Pattern Based Message Filters (PBMF),
or Specific Access Patterns (SAP) set to Trust or Allow Relaying. Senders in the Trusted Sender list
are excluded from processing (for low priority PBMFs only.)
SPF (Sender Policy Framework)
If enabled, the message is checked to see if it passes an SPF DNS lookup.
Anti-Spam Processing
If the message arrives from an "untrusted" source, it will be processed for spam as follows:
• If RBL is enabled, rejects mail if the server address is in an RBL. This can be overridden with a
Pattern Based Message Filter.
• If DCC is enabled, the message will be examined for identification as "bulk" mail.
• If STA is enabled, the message will be examined for identification as "spam" mail.
Mail Mappings
The message is now accepted for processing, and the following occurs:
• If the recipient address is not for a domain or sub-domain for which ePrism is configured to
accept mail (either as an inbound mail route or a virtual domain) then the message is rejected.
• If the recipient address is mapped in the Mail Mappings table, then the "To" field in the message
header will be modified as required.
Virtual Mappings
The message is now examined for a match in the Virtual Mapping table. If such a mapping is
found, the envelope-header recipient field will be modified as required. LDAP virtual mappings
will then be processed.
Virtual mappings are useful for the following:
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