Email Gun.
OTP and campaigns that land in the inbox.
Verify your domain, ship with API keys, and send transactional mail without wrestling SMTP. Built for product teams who care about deliverability.
curl -X POST https://email-gun-api.quecko.org/api/v1/emails/otp \
-H "X-API-Key: eg_••••" \
-H "Content-Type: application/json" \
-d '{
"to": "user@gmail.com",
"from": "noreply@yourdomain.com",
"otp": "482913",
"subject": "Your login code",
"html": "<p>Code: <strong>{{otp}}</strong></p>"
}'Everything you need to send.
One API for verification codes, receipts, and list campaigns — with domain authentication that Gmail actually respects.
Transactional & OTP
Priority queue, template variables, and rate limits so login codes stay fast and safe.
Domain authenticity
Ownership verify plus SPF/DMARC guidance — so mailed-by matches your brand.
Campaigns & lists
Import contacts, schedule sends, track stats, and honor unsubscribes automatically.
Live in minutes.
- 01
Sign up & verify email
- 02
Add & authenticate domain
- 03
Create an API key
- 04
Send OTP or a campaign