email API with bounce management

If you want an email API with bounce management, here are the key things to look for and some solid options.

What “bounce management” should include

A good email API should provide:

• Bounce webhooks/events for hard and soft bounces
• Suppression list management to avoid retrying bad addresses
• Complaint/spam report tracking
• Delivery status notifications
• Automatic handling of invalid recipients
• Retry policies for transient failures
• Domain/IP reputation tools and bounce analytics

Popular email APIs with bounce management

1. SendGrid

• Strong bounce and complaint handling
• Event webhooks for bounces, blocks, deferred, spam reports
• Suppression groups and global suppression lists
• Good docs and broad adoption

2. Mailgun

• Detailed event tracking
• Bounce, spam complaint, and unsubscribe events
• Route-based handling and suppression controls
• Good for developers needing flexible email workflows

3. Amazon SES

• Very cost-effective
• Bounce and complaint notifications via SNS
• Requires more setup than others
• Good if you already use AWS

4. Postmark

• Excellent deliverability
• Clear bounce classification
• Event webhooks and suppression lists
• Great for transactional email

5. Resend

• Simple modern API
• Webhooks for delivery events including bounces
• Easier developer experience, though less mature than the biggest players

Recommendation

• Best overall for ease of use: SendGrid or Postmark
• Best for low cost at scale: Amazon SES
• Best for flexible event handling: Mailgun

If you’re building bounce management yourself

You’ll typically want this flow:

1. Send email through API
2. Receive webhook for bounce/complaint
3. Classify bounce as hard or soft
4. Add hard-bounced address to suppression list
5. Retry soft bounces with backoff
6. Store reason codes for reporting

If you want, I can also give you:

• a comparison table
• recommended API for your use case
• or sample code for handling bounce webhooks in Node/Python/PHP.