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350-701 Practice Question: Which TWO of the following are common causes of…
Which TWO of the following are common causes of email delivery delays in Cisco Email Security Appliance (ESA)? (Select exactly two.)
⚠ Common exam trap
Cisco often tests the distinction between causes of delays (e.g., queue buildup or slow external responses) versus causes of permanent failures (e.g., incorrect MX records) or authentication issues (e.g., SPF), leading candidates to confuse delivery failures with delays.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
High volume of email in the delivery queue
A high volume of email in the delivery queue indicates that the ESA is experiencing a backlog of messages awaiting delivery. This can occur due to rate limiting, transient delivery failures, or a large number of messages being processed simultaneously, which directly causes delays in email delivery as the queue must be drained sequentially.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Too many recipients in a single message
Why it's wrong here
Can cause deferral or backscatter.
- ✓
High volume of email in the delivery queue
Why this is correct
Causes queuing delays.
- ✓
Slow response from the destination mail server during SenderBase reputation check
Why this is correct
Introduces latency.
- ✗
Incorrect MX record for the destination domain
Why it's wrong here
Causes non-delivery.
- ✗
Improper SPF record on the sender's domain
Why it's wrong here
Causes rejection, not delay.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-701 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-701 exam.