How can I send transactional emails without maintaining delivery infrastructure?

You can avoid maintaining your own delivery infrastructure by using a transactional email service provider (ESP). These services handle the SMTP relays, IP reputation, bounce processing, retries, and deliverability tuning for you.

Common options

• SendGrid
• Amazon SES
• Mailgun
• Postmark
• SparkPost
• Resend

Typical setup

1. Create an account with the provider.
2. Verify your sending domain by adding DNS records:
   • SPF
   • DKIM
   • usually a DMARC policy too
3. Send mail via API or SMTP
   • API is often simpler and more reliable for apps
   • SMTP works if you already have mail-sending code
4. Use webhooks/events to track:
   • deliveries
   • bounces
   • complaints
   • unsubscribes
5. Warm up gradually if you’re sending at scale.

Why this is better than self-hosting

• No need to manage mail servers
• Better inbox placement
• Automatic bounce handling
• Lower risk of IP/domain reputation issues
• Easier scaling and monitoring

Good choice by use case

• Lowest cost at scale: Amazon SES
• Best developer experience / simple setup: Postmark or Resend
• General-purpose and flexible: SendGrid or Mailgun

If you want, I can recommend the best provider for your stack and expected email volume.