Complete REST API for managing email delivery, tracking, and analytics.
Get started in minutes:
For detailed guides, see the Getting Started section in the navigation.
Q: Why do I need to verify my domain?
Domain verification proves you own the domain and enables email authentication (SPF, DKIM, DMARC), which significantly improves deliverability and prevents spoofing.
Q: How long does DNS verification take?
DNS changes typically propagate within 1-4 hours, but can take up to 48 hours in some cases.
Q: Do I need a subdomain or can I use my main domain?
We recommend using a subdomain like mail.yourdomain.com for sending. This:
Q: What if my domain verification fails?
Check that:
Use the verify endpoint to see specific failure reasons.
Q: Can I use multiple domains?
Yes! You can add multiple domains to your account (based on your plan limits). Each domain has independent statistics and reputation.
Q: What's the difference between SMTP and REST API?
/api/send) for sending emails with JSON payload - recommended for modern applicationsQ: What SMTP ports do you support?
Q: Can I send attachments?
Yes, attachments are fully supported via SMTP. Maximum email size including attachments is 10MB.
Q: How many recipients can I send to per email?
Maximum 50 recipients per email. For larger lists, send multiple emails or use our bulk sending features.
Q: What's the sending rate limit?
Rate limits depend on your plan and IP reputation:
Q: Why are my emails going to spam?
Common causes:
Q: How does open tracking work?
We insert a tiny invisible 1x1 pixel image in your emails. When the recipient opens the email and images load, we record the open event.
Limitations:
Q: How does click tracking work?
We automatically rewrite all links to route through our tracking domain. When clicked, we record the event and redirect to the original URL (typically under 100ms).
Q: Can I disable tracking for specific emails?
Yes, tracking can be disabled:
Q: How long do you store tracking data?
Enterprise plans can request extended retention.
Q: What timezone are timestamps in?
All timestamps are in UTC (Coordinated Universal Time) using ISO 8601 format: 2024-03-15T14:30:00Z