Prompt
What should I use for reliable app emails and bounce handling?
Latest observation
Oct 4, 2026
OpenAI APIWeb search: off
For reliable app emails with solid bounce handling, the best choice is usually a transactional email service rather than sending directly from your app server.
Good options
- Amazon SES — very reliable, low cost, great for scale, but a bit more setup.
- Postmark — excellent deliverability and very easy bounce handling/webhooks.
- SendGrid — popular, feature-rich, good integrations.
- Mailgun — solid API and event webhooks, flexible.
- Resend — simpler developer experience, good for modern app stacks.
What to look for
For bounce handling specifically, choose a provider that offers:
- Webhooks / event notifications for bounces, complaints, and deliveries
- Suppression lists so you stop sending to bad addresses
- Domain authentication support: SPF, DKIM, DMARC
- Dedicated sending domain
- Retry and queue support for temporary failures
Practical recommendation
If you want the safest default:
- Postmark if you want the easiest reliable setup and strong bounce handling
- Amazon SES if cost and scale matter most
- SendGrid/Mailgun if you want broader features and flexible APIs
Important note
Even with a good provider, you should:
- verify email addresses at signup if possible
- keep a local record of bounce/complaint events
- remove hard-bounced addresses immediately
- treat repeated soft bounces carefully
If you want, I can recommend the best option based on your stack, volume, and budget.