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You created an SNS subscription with protocol 'email' but the subscriber never receives messages. What is the most likely cause?

medium📝 Debug Q14 of 15
AWS - SNS and SQS
You created an SNS subscription with protocol 'email' but the subscriber never receives messages. What is the most likely cause?
AThe email address was not confirmed by the subscriber.
BThe SNS topic does not support email protocol.
CThe subscription endpoint was set to a phone number.
DLambda function is not attached to the subscription.
Step-by-Step Solution
Solution:

  1. Step 1: Understand email subscription confirmation

    Email subscriptions require the recipient to confirm by clicking a link in a confirmation email.

  2. Step 2: Identify common cause of no delivery

    If the email is not confirmed, SNS will not send notifications to that address.

  3. Final Answer:

    The email address was not confirmed by the subscriber. -> Option A

  4. Quick Check:

    Email subscriptions need confirmation [OK]
Quick Trick: Email subscriptions require confirmation before delivery [OK]
Common Mistakes:
MISTAKES
  • Assuming SNS does not support email
  • Confusing phone number as email endpoint
  • Expecting Lambda involvement in email subscription

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