Kaspersky Secure Mail Gateway is integrated into the existing corporate mail infrastructure and is not a standalone mail system. For example, Kaspersky Secure Mail Gateway does not deliver email messages to recipients and does not manage user accounts.
You can integrate Kaspersky Secure Mail Gateway into the corporate email infrastructure in one of the following ways:
Kaspersky Secure Mail Gateway receives email messages directly from the Internet and relays them to internal mail servers, and also receives messages from internal mail servers and relays them to the Internet.
Kaspersky Secure Mail Gateway receives messages from an intermediate gateway and relays them to internal mail servers, and also receives messages from internal mail servers and relays them to the edge gateway. In this case, SMTP verification of recipient email addresses is enabled on the edge gateway.
Kaspersky Secure Mail Gateway receives messages from an intermediate gateway and relays them to internal mail servers, and also receives messages from internal mail servers and relays them to the edge gateway. In this case, SMTP verification of recipient email addresses is disabled on the edge gateway.