Transactional Email Infrastructure Setup Under 5 Clicks
Send OTPs, password resets, receipts, and system alerts with guaranteed inbox placement. No SMTP configuration, no DNS headaches, no app passwords.
7 day free trial. No credit card required.
< 5s Average Time to Inbox
Delivered fast via optimized infrastructure and multi-region routing.
99.77% Deliverability Rate
SPF, DKIM, DMARC-ready with trusted providers for maximum inbox placement.
100% Delivery Transparency
Track delivery, opens, clicks, and full email timelines in one place.
Trusted by world-class developers & industry leading teams
Everything You Need to Send with Confidence
Built for developers who need reliable, fast, and measurable email delivery without the infrastructure overhead.
Instant Delivery
OTPs, password resets, and alerts reach inboxes in milliseconds, not seconds. No queues, no delays.
99.77% Inbox Rate
Backed by Gmail, Google Workspace, and Outlook infrastructure with SPF, DKIM, and DMARC verified by default.
Under 5-Minute Setup
Generate API keys or SMTP credentials from your dashboard and send your first email in minutes. No DNS fiddling.
Developer-First API
REST API, SMTP relay, and Webhooks. Send from any language or framework.
Custom Domain Support
Bring your own domain and send as hello@yourdomain.com with full SPF + DKIM + DMARC verification.
Delivery Analytics
Track opens, clicks, bounces, and delivery status in real time. Detailed logs for every transactional event.
REST APIasync
send-email.js
const axios = require('axios');
const client = axios.create({
baseURL: 'https://api.keplars.com',
headers: {
'Authorization': 'Bearer kms_3725865b5eee62f0.*******************************'
}
});
await client.post('/api/v1/send-email/instant', {
to: ['user@example.com'],
subject: 'Your 2FA Code',
body: '<b>Your verification code is: 123456</b>',
is_html: true
});
SMTP Relayport 587
smtp-config.txt
Host: smtp.keplars.com
Port: 587 (recommended, STARTTLS)
Security: STARTTLS
Username: [Your generated username]
Password: [Your generated password]
Integrate in minutes, not days.
Full API reference, webhook docs, and code examples. Everything you need to go live fast.
Webhooks
Real-time event notifications for every email lifecycle state.
Start sending transactional emails in under 5 clicks
5,000 emails/month for $1. No credit card needed.
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Enceladas
The Unified Email Editor