Symantec 10744983 - Mail Security 8320, Administration Manual

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Note: Symantec Mail Security does not filter messages that don't flow through
the SMTP gateway. For example, when two mailboxes reside on the same MS
Exchange Server, or on different MS Exchange Servers within an Exchange
organization, their messages will not pass through the Symantec Mail Security
filters.
Architecture
Figure 1-1 shows how a Symantec Mail Security installation processes an email
message, assuming the sample message passes through the Filtering Engine to
the Transformation Engine without being rejected.
Figure 1-1
Symantec Mail Security architecture
Messages proceed through the installation in the following way:
■
The incoming connection arrives at the inbound MTA via TCP/IP.
19 About Symantec Mail Security
Architecture