Building a Large-Scale Email Delivery Platform with Amazon SES - Optimizing Deliverability and Managing Sender Reputation
Learn how to configure email sending with SES, set up DKIM/SPF authentication, handle bounces and complaints, and manage sender reputation.
Overview of SES
SES is a cloud-based service for sending and receiving email at scale. It is used for transactional emails (order confirmations, password resets), marketing emails (newsletters, campaigns), and notification emails (alerts, reports). With pay-as-you-go pricing of $0.10 per 1,000 emails, it significantly reduces the cost of high-volume sending.
Deliverability and Sender Reputation
To maximize email deliverability, configuring DKIM, SPF, and DMARC authentication is essential. SES automatically applies DKIM signatures with Easy DKIM and passes SPF authentication through a custom MAIL FROM domain. You must maintain a bounce rate below 5% and a complaint rate below 0.1%; exceeding these thresholds can result in temporary suspension of your account's sending capability. Build a workflow that receives bounce and complaint notifications in real time via SNS and automatically removes affected addresses from your mailing list using Lambda.
Templates and Receipt Rules
SES email templates use Handlebars syntax to embed dynamic content, and the SendBulkTemplatedEmail API sends large volumes of personalized emails in bulk. Receipt rule sets automate incoming email processing, with options to save to S3, invoke Lambda, send SNS notifications, or forward to WorkMail. Virtual Deliverability Manager visualizes sending email deliverability on a dashboard and provides recommendations for improving bounce and complaint rates. Configuration sets deliver email sending events (send, delivery, bounce, complaint, open, click) to Kinesis Data Firehose or SNS for sending analytics. You can systematically learn SES from basics to advanced topics through books (Amazon).
SES Pricing
SES sending costs approximately $0.10 per 1,000 emails, with attachments charged at approximately $0.12 per GB. Sending from EC2 includes 62,000 free emails per month. Receiving is free for the first 1,000 emails, then approximately $0.10 per 1,000 emails thereafter. Dedicated IP addresses cost approximately $24.95 per IP per month, used when sender reputation isolation is needed. Virtual Deliverability Manager adds approximately $0.07 per 1,000 emails.
Summary
Getting started with SES begins with sending tests in sandbox mode, followed by requesting production access to move into live operations. Maintaining deliverability requires DKIM and SPF authentication setup, building bounce and complaint processing workflows, and monitoring sender reputation. Track deliverability trends using the Virtual Deliverability Manager dashboard to detect early signs of issues. For high-volume sending, isolate reputation with dedicated IP addresses and gradually increase sending volume with a warm-up period.