Cisco Cisco Email Security Appliance C190 User Guide

Cisco AsyncOS 9.1 for Email 사용 설명서

7 장     HAT(Host Access Table)를 사용하여 연결할 수 있는 호스트 정의

  발신자 확인

발신자 확인

DNS에서 확인할 수 없는 도메인 또는 IP 주소를 가진 발신자가 스팸 및 원치 않는 메일을 자주 전
송합니다. DNS 확인을 통해 발신자 및 프로세스 메일에 대해 신뢰할 수 있는 정보를 얻을 수 있습
니다. SMTP 대화(발신자의 IP 주소에 대한 DNS 조회에 따라 연결 필터링)를 수행하기 전에 발신
자를 확인하면 어플라이언스에서 메일 파이프라인을 통해 처리되는 정크 메일의 양을 줄일 수 있
습니다.

확인되지 않은 발신자가 보낸 메일은 자동으로 삭제되지 않습니다. 대신, AsyncOS는 발신자 확인 
설정을 제공하여 어플라이언스에서 확인되지 않은 발신자가 보낸 메일을 처리하는 방법을 결정할 
수 있습니다. 예를 들어, SMTP 대화를 수행하기 전에 확인되지 않은 발신자가 보낸 모든 메일을 자
동으로 차단하거나 확인되지 않은 발신자를 제한하도록 어플라이언스를 구성할 수 있습니다.

발신자 확인 기능은 다음 구성 요소로 이루어집니다. 

연결 호스트 확인. SMTP 대화 이전에 수행됩니다. 자세한 내용은 

 항목을 참조하십시오.

봉투 발신자의 도메인 영역 확인. SMTP 대화 중에 수행됩니다. 자세한 내용은 

 항목을 참조하십시오.

관련 주제

What hostname should Received: headers be stamped with?

1. The hostname of the Virtual Gateway(tm) used for delivering the message

2. The hostname of the interface the message is received on

[2]>

The system will always add a Message-ID header to outgoing messages that don't already 

have one.  Would you like to do the same for incoming messages? (Not recommended.) [N]>

By default connections with a HAT REJECT policy will be closed with a banner message at 

the start of the SMTP conversation.  Would you like to do the rejection at the message 

recipient level instead for more detailed logging of rejected mail? [N]>

Currently configured listeners:

1. InboundMail (on PublicNet, 192.168.2.1) SMTP TCP Port 25 Public

2. OutboundMail (on PrivateNet, 192.168.1.1) SMTP TCP Port 25 Private

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