Email Validation
Automatically validate recipient email addresses before sending to protect your sender reputation.
1What is Email Validation?
AWS SES Email Validation automatically checks every recipient address before sending your email. It analyzes addresses using multiple signals to determine delivery risk:
Syntax Validation
Checks if the email format is valid (e.g., user@domain.com)
DNS/MX Verification
Verifies the domain has valid mail exchange records
Mailbox Existence
Checks if the specific mailbox actually exists
Risk Assessment
Identifies disposable, role-based, and risky addresses
2Confidence Thresholds
When enabled, Transmit uses the MANAGED threshold, allowing AWS to automatically determine which emails are risky based on their confidence score:
Very likely to be delivered. Email passes all checks.
Some risk factors detected. May be deliverable.
High risk of bounce or complaint. Will be suppressed.
3How to Enable
Navigate to Domains
Go to the Domains page and click on a verified domain.
Find Email Validation
In the domain panel, look for the "Email Validation" toggle at the top of Outbound Configuration.
Toggle On
Click the toggle to enable. AWS will now validate every recipient before sending.
4Pricing
Email Validation is billed by AWS directly to your AWS account:
For example, validating 100,000 emails costs only $1.00. This is significantly cheaper than the cost of bounces damaging your sender reputation.
Why Use Email Validation?
🛡️ Protect Reputation
Avoid bounces and complaints that hurt your sender score.
💰 Save Money
Don't pay to send emails that will never be delivered.
📈 Better Metrics
Higher open rates when you're only sending to valid addresses.
🚫 Block Disposables
Automatically reject temporary/throwaway email addresses.