Your devices still send the alert. The text never arrives. Here’s the 30-minute fix — no firmware change.
LEGACY IoT / M2M · NO FIRMWARE CHANGE

Your devices texted via carrier gateways for years. Now they go dark.

RTUs, sensors, alarm panels and GPS/M2M gear that emailed alerts to @vtext.com, @tmomail.net, @txt.att.net are silently failing — carriers shut those gateways down in 2025. Fix it in 30 minutes. No reflashing, no hardware swap, no truck rolls.

7-day free trial · Card required after trial · Cancel anytime

RTUs · sensors · alarm panels · GPS
One address, every carrier
2:47
Mon, May 22 · 3 alerts
! TextBolt Alertsnow
🔴 Freezer-A temp 14°C (limit 8°C)
! TextBolt Alertsnow
🔴 Tank 7 level 6% — refill needed
TextBolt Alertsnow
🟢 RECOVERED: Gen-2 power restored

Real SMS to whoever’s on call — not a black hole.

Works with RTUs·environmental sensors·alarm panels·tank/fuel monitors·GPS / fleet
THE DELIVERY GAP

Dying carrier gateways vs TextBolt

What actually reaches a phone when your device fires an alert.

Carrier email-to-text (@vtext.com et al.)30–40%
TextBolt 10DLC delivery98%
0%
delivery via 10DLC
0
firmware changes
0
year carriers cut it off
SYMPTOMS

The device says it sent the alert. Nobody got it.

Carrier gateways accept the device’s email at the MX, then drop it silently — and most field gear can’t be easily reprogrammed.

SYMPTOM 01

Device log says “alert sent”

The gateway accepted it at the MX; the carrier dropped it after. The device only knows the SMTP handshake.

SYMPTOM 02

Multiple recipients all stop at once

Everyone on a carrier domain goes silent together — it looks like the device failed, but the gateway died.

SYMPTOM 03

No bounce, no NDR

Carriers stopped issuing non-delivery receipts. Your mail log looks clean; the text never existed.

SYMPTOM 04

You find out when the tank overflows

Freezer warm, fuel low, door breached, power lost — discovered hours late because the alert SMS vanished.

The fix

Change one address, not the hardware.

📟 Device / RTU
✉️ emails alert
TextBolt
📱 SMS to phone(s)
STEP 01

Open the device alert config

Find the email-alert recipient pointing at 5125551234@vtext.com or similar.

STEP 02

Swap to @sendemailtotext.com

Same number, different gateway: +15125551234@sendemailtotext.com. No reflash, no SDK.

STEP 03

Trigger a test alert

Phone buzzes. Done. One address fans out to any US number, any carrier.

CARRIER GATEWAYS ARE GONE

Your devices aren’t broken. The carriers are.

JUNE 17, 2025

AT&T shut @txt.att.net

Hard cutoff — no bounce, no NDR.

DEC 2024

T-Mobile killed @tmomail.net

Silent. Accepts mail, drops it.

→ MARCH 31, 2027

Verizon retiring @vtext.com

Already 30–40% delivery today.

Compare

TextBolt vs reflashing the gear you can’t easily reach.

Reflash / new API
Cellular modem swap
TextBolt
Keep existing firmware?
✗ re-flash
✗ hardware
✓ swap domain
Truck rolls to sites
Often
Yes
None
Dev / engineering time
Significant
Some
None
Multiple carriers, one address
If you build it
Per-SIM
✓ Yes
Time to working
Weeks
Days
~30 min

← Swipe to compare →

Pricing

Flat monthly fee. Up to 10 senders included.

7-day free trial. No per-device subscription.

Basic
$29/mo

A few devices / one site.

  • 500 credits/mo
  • 1 verified 10DLC number
  • Replies thread to inbox
Start free trial
Professional
$99/mo

High-volume device fleets.

  • 2,500 credits/mo
  • Advanced analytics
  • Migration kickoff call
Start free trial
FAQ

Device / M2M SMS questions.

Do I have to reprogram or reflash my devices?

No. If the device can email an alert, just change the recipient address to your TextBolt address. Firmware stays untouched.

Can one address reach multiple recipients / carriers?

Yes — one TextBolt address fans out reliable SMS to any US number on any carrier, so you stop juggling per-carrier gateway domains.

How fast can I migrate a fleet?

~30 minutes for the first device; 24–48 hours for 10DLC approval. For large fleets we’ll help script the recipient change.
30-MIN SETUP · 7-DAY FREE TRIAL

Same device. Same firmware.
Different gateway. Alerts arrive.

Swap @vtext.com for @sendemailtotext.com. Trigger a test. Phones buzz.

Start free 7-day trial →