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Prompt

Need a transactional email API with webhook callbacks and message status logs

Technology / API Platforms1 observationLast seen Oct 16, 2026

Latest observation

Oct 16, 2026OpenAI APIWeb search: off

Here are solid transactional email API options that support webhook callbacks and message status logs:

Top choices

1) SendGrid

  • API: Yes
  • Webhooks: Event Webhook for delivered, opened, clicked, bounced, deferred, spam report, etc.
  • Logs: Detailed activity feed and message trace
  • Good for: Mature feature set, easy integration, high volume

2) Mailgun

  • API: Yes
  • Webhooks: Yes — delivery, open, click, bounce, complaint, unsubscribe, etc.
  • Logs: Message events and searchable logs
  • Good for: Strong developer tooling and message tracking

3) Postmark

  • API: Yes
  • Webhooks: Yes — delivered, bounced, opened, clicked, spam complaint
  • Logs: Excellent message history and delivery status
  • Good for: Pure transactional email, very reliable logging

4) Amazon SES + SNS/EventBridge

  • API: Yes
  • Webhooks: Indirect via SNS/EventBridge
  • Logs: CloudWatch + SES event publishing
  • Good for: Lowest cost at scale, but more setup

5) Brevo (Sendinblue)

  • API: Yes
  • Webhooks: Yes
  • Logs: Message activity tracking
  • Good for: Transactional + marketing in one platform

Best fit by need

  • Best overall for transactional email: Postmark
  • Best feature-rich platform: SendGrid
  • Best simple developer experience: Mailgun
  • Best low-cost at scale: Amazon SES
  • Best all-in-one with marketing: Brevo

What to look for

Make sure the provider supports:

  • Outbound API sending
  • Webhook callbacks for:
    • delivered
    • bounced
    • deferred
    • opened
    • clicked
    • spam complaint
    • unsubscribed
  • Message status logs/search
  • Retry handling
  • Suppression lists
  • DKIM/SPF/DMARC support

Recommendation

If you want the cleanest transactional setup with strong logs and webhooks, I’d start with:

  • Postmark if reliability and clarity matter most
  • SendGrid if you want more reporting and broader email tooling
  • Mailgun if you want flexible APIs and event tracking

If you want, I can also give you:

  1. a comparison table,
  2. a recommended architecture, or
  3. sample webhook payloads and API examples.

Brands

TwilioMailgunPostmarkAmazon SesBrevo

Observation history

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