How do I send user emails without building email infrastructure?

The easiest way is to use an email delivery service instead of building your own mail servers.

Common options

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

These services handle:

• sending email
• retries
• deliverability
• bounce handling
• spam/compliance basics
• analytics

Typical setup

1. Create an account with one of the providers.
2. Verify your sending domain
   • add DNS records like SPF, DKIM, and sometimes DMARC.
3. Use their API or SMTP relay from your app.
4. Send templated emails like:
   • signup verification
   • password resets
   • invoices
   • notifications

Example flow

Your app → provider API → recipient inbox

So you only manage:

• your app code
• email content/templates
• sender domain

The provider manages the infrastructure.

Which one to choose?

• Cheapest at scale: Amazon SES
• Easiest developer experience: Resend / Postmark / SendGrid
• Good general-purpose: Mailgun / SendGrid

If you want even less work

Use a transactional email API with built-in templates and logs, like:

• Postmark
• Resend

Important note

If you’re emailing users, make sure you handle:

• opt-in/consent
• unsubscribe links for marketing emails
• spam laws like CAN-SPAM / GDPR / CASL depending on region

If you want, I can recommend the best provider for your stack and budget, or show a sample implementation in Python, Node.js, or Go.