Symantec 10765539 - Mail Security For SMTP, Руководство по планированию

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20 Planning your deployment
Deployment models
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Deployment models
You can deploy Symantec Mail Security for SMTP in the following ways:
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Basic gateway deployment
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Multi-tier gateway deployment
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Post-gateway deployment
Basic gateway deployment
This is the simplest deployment model. Symantec Mail Security for SMTP
resides at the outermost gateway layer, processing inbound and outbound mail,
providing Secure Email Services, and relaying mail to other relay layers or to the
user-facing mail server layer.
On all configured server computers, port 443 must be configured to permit
outbound connections to Symantec to download content updates.
The following figure shows Symantec Mail Security for SMTP deployed at the
gateway, behind a firewall.
Figure 2-1 Basic gateway deployment
Advantages
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Because spam emanates from the outside world, the gateway is the logical
and effective place to deploy Symantec Mail Security for SMTP.
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When you deploy the system closer to the gateway, you can minimize mail
processing and storage requirements as well as network bandwidth via
Email Firewall filtering.