Water & wastewater treatment
Lift stations · Clearwells
Digesters · Pumping plants
Digesters · Pumping plants
Carrier email-to-SMS gateways (@txt.att.net, @vtext.com, @tmomail.net) shut down in 2025. WIN-911 still tries to deliver — the carriers black-hole it silently. Fix it in 30 minutes. No SmartSights upgrade, no cellular modem, no SCADA changes.
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5125551234@txt.att.net+15125551234@sendemailtotext.comSame recipient field in your alarm group. Same WIN-911. Different gateway.
Carrier email-to-SMS gateways accept the email at the MX, then drop it silently. WIN-911 has no way to know. Your audit log shows compliance — your operator missed the page.
The gateway accepted it at the MX. The carrier dropped it after. WIN-911 only knows the SMTP handshake — it has no view into what happens after carrier ingress.
The alarm escalates to a Tier 2 supervisor. Same gateway. Same silence. Entire callout chain fails because every recipient is on a dead carrier domain.
Carriers stopped issuing non-delivery receipts when they decommissioned the gateways. WIN-911 sees nothing wrong. Your SMTP server sees nothing wrong. The text just doesn't exist.
Or the digester pH alarm wasn't caught. Or the clearwell turbidity went out of spec for six hours. You discover the broken alarm path the same way the public does.
Recognize any of these? Your carrier-gateway recipients are dead — and WIN-911 has no idea.
Fix the recipient list — 30-min setup →"If WIN-911 says the alarm was sent and the carrier silently dropped it, your audit log shows compliance — but your operator missed the page. That's the worst kind of failure mode."
Industrial verticals running WIN-911 (or any SCADA-attached alarm manager) into carrier email-to-SMS. Same recipient swap. Same WIN-911 logic. Different gateway.
Different SCADA stack or alarm manager? 15-min call — bring your recipient list →
Open the alarm group. Swap the domain. Force a test alarm. Done — on V7, V2021, or 2025.
The one with 5125551234@txt.att.net or similar carrier-gateway addresses. Every operator on every escalation tier.
@sendemailtotext.comSame number, different gateway: +15125551234@sendemailtotext.com. No code, no SDK, no upgrade. WIN-911 doesn't care which SMTP domain it talks to.
Operator's phone rings. Done. Works with V7, V2021, and 2025. Replies from the operator come back as threaded emails in your inbox — handy for acknowledgment workflows.
Mobile-911 / SmartSights upgrade requires WIN-911 2025 + per-user subscription + smartphone with data + no audit trail of carrier delivery. TextBolt is a $29/mo email recipient swap that works with V7. Your existing alarm groups, escalation tiers, and SCADA-side logic stay exactly where they are.
@txt.att.netHard cutoff. Anything sent to @txt.att.net from June 17, 2025 onward goes nowhere. No bounce, no NDR.
@tmomail.netT-Mobile / Sprint email-to-SMS gateway accepts mail and drops it. No public deprecation notice. Operators with T-Mobile numbers stopped getting pages overnight.
@vtext.comCloudfilter/Proofpoint already drops most business mail (AUP#CDRBL, AUP#MXRT). Full cutoff March 31, 2027 — but real-world delivery is already at 30–40%.
WIN-911 isn't broken. WIN-911 is doing its job. The carriers are the problem — and they're not coming back. Every operator on a carrier-gateway recipient address needs a different destination domain. Same WIN-911 logic, different domain.
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Since Feb 1, 2025, AT&T, T-Mobile, and Verizon block every A2P SMS that isn't registered with The Campaign Registry. Penalties run up to $10,000 per content violation. We handle it.
Full breakdown: 10DLC compliance guide →
"Our lift stations alarm to 4 operators in rotation. Lost 6 weeks of confidence after txt.att.net died. Migrated, tested with deliberate alarm — every operator got paged."
"We can't lose a digester alarm at 3am. txt.att.net failures meant operators were getting calls from each other when they noticed missed pages. Now we get the SMS first."
"WIN-911 V7 from 2018. Upgrading is $40K + 3 days of validation. TextBolt was 30 minutes."
1 message credit = 1 SMS segment (~155 chars). Most alarm pages = 1 credit. 7-day free trial on all plans. No per-operator subscription.
Single-site SCADA setups.
Multi-site water districts & plants.
High-volume / Part 11 validated.
Running a multi-site utility with 5,000+ pages a month? Enterprise pricing →·Toll-free add-on $45/year
@txt.att.net or @sendemailtotext.com. No upgrade, no patch, no validation window required.Edit the recipient list. Swap @txt.att.net for @sendemailtotext.com. Force a test alarm. Operators get paged.
Works with V7, V2021, 2025 · No SCADA touch · Delivery receipts for audit