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Transactional email
Transactional Email
Reliable transactional email API for apps and businesses
Send OTPs, password resets, order confirmations, invoices, login alerts, and business notifications through a fast API built for reliable inbox delivery.
99.9%+ Delivered (Avg)
Simple Integration
Developer Friendly
Send every critical email from one platform
OTP Emails
Fast and secure OTP emails for signups, logins, and verification.
Password Resets
Reliable password reset emails to help users recover access.
Login Alerts
Notify users instantly about new logins and account access activity.
Invoices & Receipts
Deliver invoices, billing alerts, and payment confirmations.
Order Confirmations
Send clear order confirmation emails after every successful purchase.
Security Notifications
Keep users informed about important account and security updates.
From API trigger to inbox delivery
Connect your app, trigger critical emails, and track every delivery event from one clean flow.
Trigger
Send OTPs, resets, receipts, and alerts
Send
Queue and process emails instantly
Deliver
Improve inbox placement with SPF, DKIM, and DMARC
Track
Monitor delivered, failed, bounced, opened, and clicked emails
Why businesses choose MailCub
High Deliverability
Built for high placement in OTPs, alerts, and critical transactional emails.
Low-Cost Sending
Affordable scaling with software that adapts and grows with business needs.
Simple API
RESTful, developer-first API for fast integration with docs and SDKs.
Real-Time Logs
Track deliveries, opens, clicks, bounces, and failures in real time.
Bounce & Failure Tracking
Track failed, bounced, and rejected emails before they affect user experience.
Human Support
Real people, quick help when you need it most.
Built for visibility and reliable delivery
SPF, DKIM & DMARC
Authenticate your domain and build trust with email providers.
Domain Branding
Create branded and beautiful from/return-path that you own.
Real-Time Events
Sent, delivered, opened, clicked, failed, and bounced events tracked live.
Webhooks
Get instant events sent to your apps automatically with webhooks.
Transactional Pricing
Simple pricing for transactional email delivery
Pay only for what you send. No hidden fees.
Start sending reliable transactional emails today
Connect your app, send your first OTP or password reset email, and track delivery from one dashboard.