When a Bypass Receiving Control is enabled for a RAT entry, which function is bypassed?

Question

Options

• AReverse DNS Lookup
• BMail Flow Policies: Max. Recipients Per Hour Code
• CLDAP Accept Query
• DReputation Filtering

• A
  2% (1)
• B
  93% (53)
• C
  2% (1)
• D
  4% (2)

Explanation

Enabling Bypass Receiving Control on a RAT (Recipient Access Table) entry tells the Cisco ESA to skip the Max. Recipients Per Hour throttle defined in Mail Flow Policies, allowing messages to that recipient to flow without rate-limiting restrictions - making B correct. This is useful for internal or trusted addresses that should never be throttled by volume controls.

Why the distractors are wrong:

• A (Reverse DNS Lookup) is controlled separately via the sender's Mail Flow Policy, not by the RAT's Bypass Receiving Control flag.
• C (LDAP Accept Query) is also governed independently - it verifies whether a recipient exists in the directory and is not toggled by this RAT setting.
• D (Reputation Filtering) operates at the connection/sender level through SenderBase and HAT (Host Access Table), completely separate from recipient-side RAT controls.

Memory tip: Think of "Receiving Control" as a flow meter on the receiving side - bypassing it removes the rate limit (recipients per hour), not lookups or reputation checks. If you remember that RAT = recipient and "control" = rate control, option B clicks into place naturally.

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