Refer to the exhibit. You have finished an installation, but the customer cannot receive mail from a business partner. Based on the mail log, how should you explain this to the customer? How can you…

Question

Options

• AAllow mail delivered from this site by changing the RAT settings from moderate to conservative.
• BHave their business partner contact IronPort support to adjust their reputation score.
• CThe business partner's MTA has been blocked based on their reputation.
• DThe business partner's MTA has been blocked based on their reputation.

• A
  13% (6)
• B
  2% (1)
• C
  7% (3)
• D
  78% (35)

Explanation

Option D correctly identifies that the business partner's mail transfer agent (MTA) is being rejected by the IronPort/Cisco ESA because its SenderBase Reputation Score falls below the threshold configured in the appliance's sender policies. The correct fix is to add the business partner's IP address to a whitelist sender group in the Host Access Table (HAT), which bypasses reputation filtering for that specific sender.

Why distractors are wrong:

• A is incorrect because the RAT (Recipient Access Table) controls which recipient addresses are valid on the local domain - it has nothing to do with sender reputation or blocking inbound mail from external senders. "Moderate to conservative" settings here would not resolve a sender reputation block.
• B is incorrect because the customer's admin can resolve this directly without involving IronPort support - simply whitelisting the partner's IP in the HAT is sufficient and is the appropriate administrative action.
• C is presented with the same text as D in this rendering, which suggests a transcription issue in the question; in the original exam, C likely omits or misidentifies the correct remediation step.

Memory tip: Think "RAT = Recipients, HAT = Hosts (Senders)" - the RAT governs who can receive at your domain; the HAT governs sender behavior and reputation policies. Any time a question involves blocking based on the sending server's reputation, your answer lives in the HAT.

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