Prompt
I'm building a startup and want simple SMTP plus webhooks
Latest observation
Oct 5, 2026
OpenAI APIWeb search: off
If you want simple SMTP + webhooks for a startup, you likely want an email API/service that supports both:
Good fits
- Postmark — very simple, great deliverability, clean SMTP support, strong inbound/outbound webhooks
- SendGrid — broad features, SMTP relay, lots of webhook/event options
- Mailgun — strong SMTP + webhooks, flexible, developer-friendly
- Amazon SES — cheap and reliable, but less “simple”; webhooks usually require extra setup with SNS/Lambda
My quick recommendation
- Best for simplicity: Postmark
- Best if you want flexibility and scale: Mailgun or SendGrid
- Best if cost matters most: SES
What to look for
Make sure the service supports:
- SMTP relay for sending
- Event webhooks for delivered/bounced/opened/clicked
- Inbound email webhooks if you need replies or processing
- Easy domain authentication: SPF, DKIM, DMARC
If you want, I can also give you a 1-minute comparison table or recommend one based on:
- budget
- volume
- need for inbound email
- whether you want to use SMTP only or also API