SendOFF Quickstart Guide
Send your first transactional email in less than 3 minutes.
Think of SendOFF like an ultra-fast digital postal service. When someone signs up for your app, you need to send them a secret 6-digit code (OTP) or purchase receipt instantly. SendOFF provides an exclusive "Fast Lane" that guarantees your email reaches their Gmail or Outlook Inbox in under 50 milliseconds, bypassing junk folders completely.
Three Simple Steps to Get Started
Get Your Secret API Key
Log in to your console and go to API Keys. Click "Create API Key". Your key looks like so_live_xxxxxxxxxxxxxxxxxxxx. Keep this key safe like a password!
Add Your Domain or Use Sandbox
Before sending from your company brand (e.g. support@mybrand.com), go to Domains to add your domain and DNS records. While testing locally, you can send test emails to your registered account email instantly!
Send Your First Email
Paste this command into your Mac, Linux, or Windows terminal. Replace $SENDOFF_API_KEY with your real key:
# cURL Command Line (Zero install)
curl -X POST https://api.sendoff.in/v1/emails \
-H "Authorization: Bearer $SENDOFF_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"from": "Acme Security <security@yourdomain.com>",
"to": ["user@example.com"],
"subject": "Verification Code: 948201",
"html": "<p>Your OTP code is <strong>948201</strong>.</p>",
"lane": "transactional"
}'{"id": "msg_01J8K...", "status": "queued", "lane": "transactional"} and the email will arrive in your inbox in less than 50ms!