Ravi Sir's Cards › AWS
Why SNS instead of SMTP from Lambda?
What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.
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What this card says
What it is
No mail server credentials in the function; SNS handles delivery to subscribed emails.
Why it matters
Later you can add SMS or another Lambda subscriber without rewriting the form handler.
How / example
Topic ARN in env; IAM sns:Publish on that ARN only.