Case Study

Transforming Legacy Email Infrastructure to Achieve 40% Cost Savings and 99% Deliverability for a Software Development Company

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Industry 

Software Development

Expertise 

Amazon SES, Amazon SNS, AWS Lambda, Amazon CloudWatch, AWS IAM

Offerings/solutions 

Reduced costs, improved deliverability, automated operations, enhanced scalability, and ensured compliance

About the Client

The client is a global technology company focused on automation and digital transformation, serving enterprises across industries with AI, machine learning, and cloud solutions to deliver resilience, scalability, and operational efficiency. Recognized as a trusted partner for innovation, the company helps organizations achieve secure and cost-effective IT operations worldwide.

Highlights

40%

Reduced Email-Sending Costs

99%

Inbox Placement Rate

Automated Scalability

Scaled to millions of emails per day

The Challenge

The client faced high costs from their legacy email provider’s premium rates for high-volume sends, along with deliverability issues, including inconsistent inbox placement and limited monitoring capabilities. Integration with AWS-hosted applications proved complex, while compliance requirements for DKIM, SPF, and DMARC enforcement needed automation. Additionally, manual bounce and complaint handling created significant operational overhead without proper automation tools.

Solutions

• Verified sending domains and configured SPF, DKIM, and DMARC for improved deliverability.
• Requested production access and increased sending limits.
• Created AWS IAM policies for least-privilege access.
• Integrated Amazon SES with AWS Lambda for automation and Amazon SNS for notifications.
• Updated application code to use Amazon SES SMTP interface and AWS SDKs.
• Implemented event publishing for bounces, complaints, and delivery notifications.
• Conducted A/B testing between the legacy provider and Amazon SES.
• Gradually shifted traffic to Amazon SES while monitoring bounce and open rates.

The Results

Delivered 40% cost reduction, 99% inbox placement with DKIM/SPF alignment, automated bounce handling via Amazon SNS and AWS Lambda, seamless scaling to millions of daily emails, and full AWS security compliance.

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