Assume that the rcpt to field does not need to be changed for delivery of incoming mail. Which of the following LDAP queries is used to check the "rcpt ton field to a member of a group?

Question

Options

• AAccept Query
• BRouting Query
• CMasquerading Query Group Query
• DSMTP Authentication Query

• A
  3% (1)
• B
  89% (33)
• C
  5% (2)
• D
  3% (1)

Explanation

Routing Query (B) is correct because, in email gateway systems like Cisco ESA, the Routing Query performs LDAP lookups against the rcpt to address to determine group membership and resolve the appropriate mail delivery destination - without modifying the recipient address itself. Since the question specifies no address change is needed, routing (not rewriting) is the right function.

Why the others are wrong:

• A. Accept Query - validates whether a recipient address exists in the directory (accept/reject decision), not group membership for routing purposes.
• C. Masquerading Query / Group Query - Masquerading rewrites addresses (the opposite of what the question states is needed); a standalone Group Query is a supporting mechanism, not the primary query type that handles rcpt to delivery resolution.
• D. SMTP Authentication Query - handles credential verification for SMTP senders, completely unrelated to recipient group membership.

Memory tip: Think "Route the mail → Routing Query." If the address stays the same but you need to know where to send it (including group expansion), that's a routing decision. If the address needs to change, think Masquerade. If you're just asking "does this address exist?", think Accept.

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