Are there any transactional email APIs that handle bounce management and audit logs well?

Yes — several transactional email providers do bounce management and audit logs well. The best choice depends on whether you care more about deliverability, compliance, ease of use, or pricing.

Strong options

1. SendGrid

• Bounce handling: Good built-in event webhooks for bounces, blocks, drops, spam reports, etc.
• Audit logs: Solid activity/event history, especially on higher plans.
• Good for: Teams that want a mature platform with lots of integrations.
• Tradeoff: Interface and pricing can feel a bit complex.

2. Postmark

• Bounce handling: Excellent and very developer-friendly bounce handling.
• Audit logs: Very clear message history and delivery events.
• Good for: Pure transactional email with strong deliverability and simple APIs.
• Tradeoff: Less of an all-in-one marketing platform.

3. Mailgun

• Bounce handling: Strong suppression list and event/webhook support.
• Audit logs: Good message logs and event tracing.
• Good for: Developers who want flexible API control.
• Tradeoff: Can require more setup/understanding than Postmark.

4. Amazon SES + SES event publishing

• Bounce handling: Very capable if you wire up SNS/EventBridge/Lambda.
• Audit logs: Possible, but you assemble more of it yourself.
• Good for: Lowest cost at scale and teams comfortable with AWS.
• Tradeoff: Not as user-friendly; audit trails are more DIY.

5. Mailjet

• Bounce handling: Reasonable bounce and suppression management.
• Audit logs: Delivery/event logs available.
• Good for: Simpler teams or mixed transactional/marketing use.
• Tradeoff: Generally not as strong as Postmark/SendGrid for transactional focus.

If you want the best “bounce + audit log” experience

• Best simple transactional choice: Postmark
• Best broad feature set: SendGrid
• Best API flexibility: Mailgun
• Best low-cost at scale: Amazon SES

What to look for

If bounce management and audit logs matter, check for:

• Webhook events for bounce, complaint, delivery, deferred, blocked
• Suppression lists with reasons and timestamps
• Per-message message IDs for tracing
• Searchable delivery history
• Retention period for logs
• Export/API access to logs for compliance or support

If you want, I can also give you:

1. a feature comparison table,
2. recommendations by use case (startup, SaaS, regulated industry), or
3. a shortlist of APIs with the best audit-log APIs specifically.