Transactional email with
control, visibility and domain protection
Mailflow is the professional layer between your corporate systems and email providers. Bounce control, automatic suppression and full traceability for those sending invoices, payment slips, alerts and critical notifications.
Sent
12.847
Delivered
12.634
Bounce
89
Suppressed
124
Millions
of emails processed per month
<200ms
average API acceptance latency
99.9%
platform availability
SMTP + API
two integration methods
Used by companies that depend on transactional email
The problem
Transactional email without governance is operational risk
Most companies don’t treat automated sending with the same seriousness as IT infrastructure. The result is silent loss of reputation, deliverability and control.
Transactional and corporate email on the same domain
When internal systems and employees share the same sending infrastructure, bounce penalties from automated flows directly affect human email delivery — including commercial and executive areas.
Sending without bounce control and suppression
Systems that keep sending to invalid addresses accumulate rejections with providers. Without automatic handling, the domain progressively loses reputation until it faces throttling or blocking.
No visibility into delivery failures
If an invoice didn’t arrive or a payment slip went to spam, the team only finds out when the client complains. No logs, no events, no webhooks — no way to diagnose or prevent.
Ignored operational and financial risk
Undelivered payment slips delay collections. Alerts that don’t arrive compromise SLAs. Rejected invoices create rework. The cost of poorly managed transactional sending is concrete and recurring.
The solution
A dedicated layer for corporate transactional sending
Mailflow operates between your systems and email providers, applying bounce control, suppression and tracking before any message leaves your domain. It’s operational infrastructure — not a marketing tool.
- Separation between transactional and human corporate email
- Automatic bounce control with hard/soft classification
- Automatic suppression of recipients with permanent errors
- Full traceability per send and per recipient
- Integration via standard SMTP or API REST
- Operations dashboard with real-time visibility
Your system sends
ERP, CRM, portal or custom application
Mailflow processes
Validation, bounce, suppression, queue, tracking
Recipient receives
With end-to-end traceable status
Tracked events
Benefits
What changes when transactional sending is managed seriously
More control, less risk. Cleaner base, more predictable delivery. The visibility your IT and operations team needs.
Domain protection
Isolate transactional sending from corporate email. Reduce the risk of cross-penalization and preserve your primary domain reputation.
Operational visibility
Status of each send in real time — delivered, rejected, suppressed or queued. Immediate diagnosis when something fails.
Automatic suppression
Recipients with permanent bounce are automatically blocked. Your sending base stays clean without manual intervention.
Flexible integration
Standard SMTP for legacy systems, API REST for modern applications. Compatible with ERPs, CRMs and custom platforms.
Sending health metrics
Dashboard with delivery rate, bounce rate, suppressions and trends. Decisions based on operational data.
Protected critical operations
Resilient queues, intelligent retry and fault tolerance. Infrastructure sized for operations that cannot stop.
Who is Mailflow for
If your system sends critical emails,
your operation needs Mailflow
Mailflow serves companies that depend on automated emails to keep operations running. If you recognize yourself in any of these scenarios, you need professional transactional infrastructure.
ERP sending invoices
SAP, TOTVS, Sankhya or custom system. If your ERP sends invoices via email, it needs delivery control.
Systems sending payment slips
Bills and due date reminders. Every payment slip that doesn’t arrive is a payment that’s delayed.
SaaS sending notifications
Registration confirmations, verification codes and alerts that users expect to receive in seconds.
E-commerce with order status
Purchase confirmation, tracking and updates that need to reach the inbox.
Applications with authentication
Password reset, 2FA and identity confirmation. Without delivery, the user is locked out.
Systems with automatic alerts
Monitoring, exceptions, deadlines and critical stock. Alerts that need to reach the right team.
Operational communications
Automated notices sent by internal systems to employees, partners or clients.
IT teams separating flows
Shared infrastructure between human and system email is a risk. Mailflow solves this with a dedicated layer.
Features
Everything corporate transactional sending demands
From sending to traceability. From bounce control to automatic suppression. Every feature designed for critical operations.
SMTP sending
Standard SMTP credentials. Compatible with any language, platform or legacy system.
API REST sending
Modern API with real-time response for applications that need programmatic control.
Bounce control
Automatic hard and soft bounce classification with configurable actions per rejection type.
Automatic suppression
Recipients with permanent bounce are blocked. No resending to invalid addresses.
Status tracking
Each email tracked from send to delivery or failure, with granular status per recipient.
Operations dashboard
Consolidated view of sends, deliveries, bounces, suppressions and flow health metrics.
Event webhooks
Real-time notifications in your system about deliveries, bounces, complaints and failures.
Detailed logs
Complete event history per send, with technical details for debugging and auditing.
Architecture
How Mailflow integrates with your operation
An intermediate layer between your systems and email providers, with control over each stage of the sending process.
Source
ERP
SAP, TOTVS, Sankhya...
CRM
Salesforce, Hubspot...
Custom system
Internal application
Portal / E-commerce
Web platform
Processing
Mailflow
Destination
Gmail
Google Workspace
Outlook
Microsoft 365
Yahoo
Yahoo Mail
Corporate providers
Private servers
# Send via API REST
curl -X POST https://mailflow.vertip.net/v1/send \
-H "Authorization: Bearer $API_KEY" \
-H "Content-Type: application/json" \
-d '{
"to": "cliente@empresa.com.br",
"subject": "NF-e 004521 emitida",
"html": "<p>Sua nota fiscal...</p>"
}
'Infrastructure
Designed for real operations
Corporate transactional sending requires capacity, resilience and predictability. Mailflow is not a generic SMTP service.
Millions
of emails processed per month
Resilient queues
with intelligent retry and backoff
Fault tolerance
redundancy at every layer
24/7
active infrastructure monitoring
FAQ
Frequently asked questions
Is Mailflow an email marketing tool?
No. Mailflow is transactional sending infrastructure — invoices, payment slips, alerts, confirmations and notifications triggered by systems. It does not offer newsletters, campaigns or marketing automation.
How does Mailflow protect my domain reputation?
Mailflow separates transactional sending from corporate email, applies automatic bounce control, suppresses invalid recipients and monitors sending health. This prevents automated flows from compromising human email delivery.
What is automatic suppression?
When a recipient generates a permanent bounce (hard bounce), Mailflow automatically blocks new send attempts to that address. This keeps the base clean and protects domain reputation.
Can I integrate with my ERP or custom system?
Yes. Mailflow offers integration via standard SMTP and API REST. Any system that sends emails — ERPs, CRMs, portals, e-commerce or custom applications — can be connected.
Does it work with legacy systems?
Yes. SMTP integration is compatible with any system that supports SMTP email sending, regardless of language or platform. No changes to the existing system code are required.
How does status tracking work?
Each email is tracked through all stages: acceptance, queueing, delivery, bounce, complaint or suppression. Events are available on the dashboard, in logs and can be received via webhook.
How do I start using Mailflow?
Contact our team for a technical assessment of your sending operation. We analyze volume, systems involved and design the most suitable integration for your scenario.
Ready to professionalize your transactional sending?
Our technical team assesses your sending operation, identifies risks and designs the most suitable integration for your scenario.