SMTP gateway for hardware & IoT
Reliable Email Delivery
for Every Device.
Connect your printers, cameras, IoT devices and industrial equipment to a reliable SMTP gateway. DeviceSMTP handles email delivery so your devices don’t have to.
Works with your hardware
If it can speak SMTP, it works with DeviceSMTP
From a single office printer to a building full of sensors, point your device at our gateway and it just sends.
… and any other hardware capable of sending email over SMTP.
The problem
Built-in device SMTP was never built to last
Hardware email features are an afterthought. The internet around them changed; the firmware didn’t.
ISPs block outgoing SMTP
Ports 25, 465 and 587 are routinely blocked on business and residential lines, so your device’s mail silently fails.
Modern auth breaks old firmware
Gmail and Microsoft 365 dropped basic authentication. Firmware that can’t do OAuth or app passwords simply stops working.
No visibility when it fails
Most devices give you a single “send failed” line — if that. You find out an alert never arrived only when it’s too late.
Fragile, scattered config
Every printer, camera and controller has its own cryptic SMTP screen. One provider change means reconfiguring every device by hand.
How it works
Three steps from “send failed” to delivered
No SDKs, no code changes, no firmware updates. Just standard SMTP settings.
Create your account
Sign up and get your DeviceSMTP gateway hostname and a set of SMTP credentials in minutes.
Point your device at the gateway
Enter our SMTP host, port and credentials into your device’s email settings. Pick TLS or SSL — we support both.
Send & monitor
Your device sends as usual. We relay it reliably and show you every message, delivery and bounce in your dashboard.
Capabilities
An SMTP platform built around devices
Everything you need to make hardware notifications dependable — and to know they arrived.
Reliable SMTP relay
A hardened relay built for always-on devices, with automatic retries when a receiving server is temporarily unavailable.
TLS & SSL everywhere
Encrypt every connection. STARTTLS on 587/2525 and implicit TLS on 465 — whichever your hardware supports.
Per-device credentials
Give each printer, camera or controller its own SMTP username and password. Rotate or revoke one without touching the rest.
Delivery logs & monitoring
Every message is logged with its status, timestamp and destination, so you can prove an alert was sent.
Sender authentication
Verify your sending domain and align SPF and DKIM so your device mail lands in the inbox, not the spam folder.
Usage & statistics
Track volume, delivery rate and bounces per device and across your whole fleet from one dashboard.
Use cases
One gateway for every connected system
Explore how DeviceSMTP fits the hardware you already run.
Infrastructure
Infrastructure that treats every message as important
Your devices only send a few messages — but each one matters. A door forced. A disk failing. A backup that didn’t run.
Smart retries
Temporary failures are retried on a backoff schedule instead of being dropped.
Modern TLS
TLS 1.2 / 1.3 negotiation so even older devices connect over an encrypted channel.
Multiple ports
587, 465 and 2525 available for firmware that only supports specific ports.
Always on
A relay designed to be there the moment your hardware needs to send.
$ device connects to mail.devicesmtp.com:587 220 DeviceSMTP ESMTP ready EHLO printer-office-1 250 STARTTLS supported STARTTLS 220 TLS 1.3 negotiated ✓ AUTH printer-office-1 ******** 235 authenticated MAIL FROM <alerts@yourco.com> RCPT TO <it@yourco.com> 250 Message accepted — queued for delivery
Monitoring
Know exactly what every device sent
Stop guessing whether a notification went out. DeviceSMTP records each message with its status so you can answer “did it send?” in seconds.
Email activity log
A searchable, per-device timeline of every message and its delivery status.
Bounce monitoring
See rejected and bounced mail immediately, with the reason the receiving server gave.
Name your devices
Label credentials as “Camera — Warehouse entrance” so logs read like your building, not IP addresses.
Security
Encrypted, authenticated, accountable
Security isn’t a plan tier. Every DeviceSMTP account gets encryption in transit, authenticated sending and verifiable logs.
Encryption in transit
STARTTLS and implicit TLS on every supported port, with modern cipher suites.
SPF & DKIM alignment
Authenticate your sending domain so recipients trust mail from your hardware.
Scoped credentials
Per-device usernames mean a compromised camera can’t leak your whole account.
Pricing
Simple plans that scale with your fleet
Start small with a handful of devices and grow to thousands. Pricing scales with the email volume and number of devices you need.
For a few devices in one location
Pricing configurable
- Entry-level monthly volume
- Multiple SMTP credentials
- Delivery logs
For growing device fleets
Pricing configurable
- Higher monthly volume
- Per-device credentials
- Bounce monitoring & stats
For large deployments
Pricing configurable
- High-volume sending
- Unlimited devices
- Priority support
FAQ
Questions, answered
Why does my printer or camera need an SMTP gateway?
Many devices can technically send email, but their built-in SMTP often fails in practice: ISPs block outgoing mail ports, and providers like Gmail and Microsoft 365 no longer accept the simple username-and-password login that older firmware uses. DeviceSMTP gives your device one stable, standards-based destination that is built to accept and relay its mail.
Do I need to change my device’s firmware or add code?
No. You only change the SMTP settings your device already has — hostname, port, encryption and credentials. There is nothing to install and no code to write.
Which SMTP ports and encryption do you support?
DeviceSMTP accepts connections on standard submission ports including 587 and 2525 with STARTTLS, and 465 with implicit SSL/TLS, so you can match whatever your hardware supports. See the configuration docs for details.
Can every device have its own credentials?
Yes. You can issue a separate SMTP username and password for each device, label them meaningfully, and revoke any one of them without affecting the others.
How do I know whether a device actually sent an email?
Every message your devices send is recorded in your activity log with a status, timestamp and destination, so you can confirm delivery or see exactly why something bounced.
Give every device a reliable way to send email.
Create your DeviceSMTP account and connect your first device today. No code, no firmware changes — just dependable delivery.