About SentinMail
What SentinMail is, why it exists, and how it's different from other email platforms
What is SentinMail?
SentinMail is an email marketing and campaign platform that puts you in control. Build responsive emails with a visual drag-and-drop builder, manage your subscriber lists, send campaigns, track delivery — and do it all through your own SMTP server.
Unlike platforms that lock you into their sending infrastructure and charge per email, SentinMail separates the platform from the sending. You pay for features, not volume. You bring your own Gmail, Amazon SES, SendGrid, Mailgun, or any SMTP server — and keep full control over your sender reputation, deliverability, and costs.
Why SentinMail?
Own Your Infrastructure
Connect your own SMTP — no forced sending fees, no vendor lock-in. Your reputation stays yours.
Built for Reliability
Every email is compiled through MJML for maximum compatibility across Gmail, Outlook, Apple Mail, and 50+ clients.
Visual Email Builder
Design with a professional-grade drag-and-drop editor. Rows, columns, reusable blocks, real-time preview.
Campaign + API Ready
Send marketing campaigns from the dashboard or automate transactional emails via the REST API.
How It Works
Bring your own SMTP
Build your emails
Grow your audience
Send and track
Key Features
Email Builder
- Drag-and-drop editor powered by MJML — responsive out of the box
- Real-time preview for desktop and mobile
- Reusable saved blocks across templates
- Personalization with
[[variables]], conditionals, and loops - Template versioning with restore
- Starter template gallery
Campaign Management
- Three send methods: to a list, to specific receivers, or custom inline
- Scheduled sending with cancel/resume
- Campaign lifecycle tracking (pending → sending → completed)
- Automatic suppression handling — unsubscribed and bounced addresses are excluded
- File attachments from the media library
Subscriber Management
- Lists with color coding for visual organization
- Individual and bulk import (CSV, JSON, manual form)
- Custom fields on subscribers for personalization
- Public subscribe page — hosted and ready to share
- Advanced segmentation with dynamic rules
Analytics & Tracking
- Open and click tracking (automatic, no setup needed)
- Bounce detection
- Company dashboard with 30-day trend charts
- Sent email history with per-recipient status
- Webhook endpoints for real-time event delivery
Developer API
- REST API with API key authentication
- Send transactional and marketing emails programmatically
- Manage subscribers, lists, templates, and campaigns via API
- Webhook integration for delivery events
- Full documentation in the Dev Guide
Team Collaboration
- Invite team members with role-based access (Owner, Admin, Member, Viewer)
- Activity log for audit trail
- Multi-company support — manage emails for different brands from one account
Billing
- Tiered subscription plans — pay for platform features, not sending volume
- Multiple payment methods: Stripe, cryptocurrency (NOWPayments), M-Pesa (Pesapal)
- Coupon support
- Usage monitoring with clear limits
Who Is SentinMail For?
| Audience | How They Use It |
|---|---|
| Marketing Teams | Build beautiful campaigns without relying on expensive sending platforms |
| SaaS Products | Send transactional emails using their own infrastructure with full control |
| Agencies | Manage multiple client accounts in one dashboard with team roles |
| Developers | Integrate email workflows directly via API with webhooks and automation |
Trust & Security
- MJML rendering — universal email client support, tested across 50+ clients
- Encrypted storage — SMTP credentials are encrypted at rest
- Background queued sending — reliable delivery with retry logic via Celery workers
- GDPR-conscious — subscriber management with unsubscribe and suppression support
- Rate-limit enforcement — protect your sender reputation with per-hour and per-day limits
- Isolated environments — each company's data is fully separated
Getting Started
Ready to dive in?