Free Transactional Email: Best Services with Free Plans (2026)
Find the best free transactional email services. Compare free tiers, sending limits, features, and setup for order confirmations, password resets, and more.
Transactional emails (order confirmations, password resets, shipping notifications) are business-critical but should not be expensive. Several providers offer free tiers generous enough to cover a small or mid-size business’s transactional volume, with the deliverability and authentication you actually need.
Free Transactional Email Providers Compared
| Provider | Free limit | API | SMTP | Authentication | Best for |
|---|---|---|---|---|---|
| Brevo | 300/day (~9K/mo) | REST API | Yes | SPF, DKIM, DMARC | Most businesses |
| Amazon SES | ~3K/mo (new accts, 1st yr) | AWS SDK | Yes | Full | AWS-hosted apps at scale |
| SendGrid | 100/day (~3K/mo) | REST API | Yes | Full | Developer apps |
| Mailjet | 200/day (~6K/mo) | REST API | Yes | Full | European businesses |
| SMTP2GO | 1,000/month | REST API | Yes | Full | Reliable focused relay |
| Postmark | 100/month | REST API | Yes | Full | Speed-critical apps |
Note: Amazon SES retired the old “62,000 free from EC2” model. New customers now get roughly 3,000 free message charges per month during the 12-month free tier.
Why Brevo Is the Easiest Free Option
- High free limit among easy-to-set-up services: 300 emails/day
- No credit card required for the free plan
- SMTP and REST API both included
- Full authentication: SPF, DKIM, DMARC
- Real-time analytics: delivery, opens, clicks
- Same account for marketing: add automation and campaigns when ready, on one verified domain
- WordPress ready: WP Mail SMTP compatible
For Shopify stores, Tajo syncs orders, products, and customer events into Brevo, so transactional emails carry real order context and the same customer record powers your marketing.
Types of Transactional Emails
| Type | Trigger | Delivery expectation |
|---|---|---|
| Order confirmation | Purchase completed | Under 2 minutes |
| Shipping notification | Order shipped | Under 5 minutes |
| Password reset | User request | Under 30 seconds |
| Account verification | Registration | Under 1 minute |
| Invoice / receipt | Payment processed | Under 2 minutes |
| Account / security alert | Security event | Under 1 minute |
For examples and templates, see our transactional email guide.
Setup: Brevo Free Transactional Email
Via SMTP
Host: smtp-relay.brevo.comPort: 587Username: Your Brevo login emailPassword: Your SMTP key (Settings > SMTP & API)Encryption: TLSVia REST API
Use the Brevo API with your API key for programmatic sending. Official libraries cover Python, Node.js, PHP, Ruby, and more. The API is preferred over plain SMTP for transactional traffic because it gives faster delivery and richer event data.
For WordPress
Install WP Mail SMTP and configure it with Brevo credentials. See our WordPress SMTP guide for step-by-step instructions, and the free SMTP server guide for the wider relay comparison.
When to Upgrade from Free
| Signal | Action |
|---|---|
| Hitting the daily limit regularly | Upgrade to Brevo Starter (~$9/month) |
| Need a dedicated IP | Move to a Business plan |
| Need advanced analytics | Upgrade for detailed reporting |
| Sending 50K+/month | Consider Amazon SES for unit cost |
| Need guaranteed delivery speed | Consider Postmark |
Best Practices
- Separate transactional from marketing streams so a campaign issue never blocks password resets
- Set up authentication: SPF, DKIM, DMARC
- Monitor delivery rate: aim for 99%+ on transactional
- Design mobile-first: most transactional email is opened on a phone
- Test across clients: Gmail, Outlook, Apple Mail
- Keep promotional content out of transactional messages, both for deliverability and compliance
FAQ
Is a free transactional email plan reliable for production? Yes at low volume. Free tiers run on the same infrastructure as paid plans; you are limited by the send cap, not the deliverability.
Why did Amazon SES’s free tier change? AWS replaced the EC2-linked 62,000/month model with a flat free-tier allowance of roughly 3,000 message charges per month for new accounts in their first year. SES is still the cheapest at high volume but no longer the most generous free tier.
Can one provider handle both transactional and marketing email? Yes. Brevo does both on one account and verified domain, which simplifies setup while still letting you separate the sending streams.
How does Tajo relate to transactional email? Tajo does not send email; it syncs Shopify data into Brevo so order confirmations and shipping notifications include accurate customer and order context, and the same record drives your marketing.
For a complete background, see what is transactional email and our SMTP complete guide.