Industrial Automation
Email alerts your production floor can trust
Machine faults, downtime events and shift reports delivered reliably from PLCs and SCADA systems — so the right people react before output suffers.
The problem
What goes wrong with industrial automation email
PLCs, SCADA systems and machine controllers email engineers and supervisors about faults, unplanned downtime, threshold alarms and end-of-shift production figures. On a factory floor, minutes of unnoticed downtime translate directly into lost output, so an alert that fails to send has a measurable cost.
Industrial controllers are chosen for longevity, not for their mail stack, and are often commissioned by an integrator and then left in place for a decade. An email path that breaks after a provider change can sit unnoticed between maintenance windows.
Why conventional SMTP setups fail
The internet moved on — the firmware didn’t
Automation hardware is rarely patched for fear of disturbing a working line, so its SMTP support stays frozen in time. Basic-authentication panels stop delivering the moment a corporate mailbox migrates to modern login requirements.
OT networks are tightly firewalled and commonly block outbound mail ports, while legacy controllers negotiate TLS versions that modern servers now reject. Without any delivery record on the controller, a critical fault email can be dropped with no trace.
How DeviceSMTP solves it
One gateway purpose-built for industrial automation
A stable relay endpoint
A single relay address that controllers can keep for years, decoupling the plant floor from corporate mailbox changes.
TLS & SSL to match the firmware
Connect legacy PLCs and gateways over the encryption they support, whether that is 587/2525 STARTTLS or 465 SSL.
Per-machine credentials & labels
Issue scoped logins like “Line 3 — Packer” so each asset is tracked and controlled on its own.
Delivery logs & bounce monitoring
Prove a fault or downtime alert was sent, and surface a bounced engineering mailbox before the next incident.
Example notifications
The kind of mail these devices send
- Machine fault and emergency-stop alarms
- Unplanned downtime and line-stoppage events
- Process threshold and tolerance alarms
- Preventive-maintenance and tooling reminders
- End-of-shift production and yield reports
- Batch-complete and quality-check summaries
Example SMTP settings
Typical configuration for a industrial automation device
Illustrative values to show the shape of a DeviceSMTP configuration. Enter the equivalents into your device’s email settings screen.
| SMTP host | smtp.devicesmtp.com (illustrative) |
| Ports | 587 (STARTTLS) · 465 (SSL/TLS) · 2525 (STARTTLS) |
| Encryption | STARTTLS on 587 / 2525, implicit SSL on 465 |
| Username | plc-line3-packer (per-device user) |
| Password | (per-device password) |
| From | ot-alerts@yourcompany.com (verified sender) |
Related use cases
Other hardware DeviceSMTP supports
Keep the production floor informed in real time.
Relay machine faults, downtime events and shift reports from every PLC and SCADA system through one trusted gateway.