US Internet Email Retirement: Fast, Hands-On Migration to Microsoft 365 or Google Workspace
US Internet and Securence are permanently turning off Hosted Exchange, POP/IMAP, and authoritative DNS. Don't let your business face bounced mail or broken deliverability. Enuclea manages your entire mailbox extraction, MX switchover, and Day-One SPF/DKIM/DMARC hardening.
Facing the November 11 US Internet Decommission?
US Internet is simplifying its operations to focus exclusively on fiber internet, voice, and network connectivity. That means their legacy mail hosting and filtering platforms will cease operations permanently.
Are You On the Affected Servers? Check Your Domain Fingerprint:
smtp1-mke.securence.com
216.17.3.48 / mail.usinternet.com
mail.securence.com
ns2.usinternet.com
The "What We Do" Triage Matrix
We handle the heavy lifting so your business doesn't skip a beat. From forgotten DNS passwords to post-cutover spam protection, here is how we protect your email:
POP3 / IMAP / Webmail Migration
We extract historical email, provision your new Microsoft 365 or Google tenant, run pre-cutover background syncs, and reconfigure your team's devices with zero data loss.
- Staged background synchronization
- Folder tree & sent items preserved
- Zero loss of historical communications
- Assisted Outlook & smartphone reconnect
Hosted Exchange Direct Cutover
For organizations running US Internet Hosted Exchange, we migrate mailboxes, shared calendars, distribution groups, and contacts natively into modern Microsoft 365 Exchange Online.
- Direct Exchange-to-Exchange migration
- Calendar & meeting invite integrity
- Shared mailboxes & aliases configured
- Desktop Outlook profile updates
Email Deliverability Hardening
The #1 failure point in rushed migrations: the week after cutover, outbound invoices get caught in spam. We configure SPF, custom 2048-bit DKIM keys, and DMARC immediately to keep your invoices out of spam filters.
- Exact SPF record synthesis
- Custom 2048-bit DKIM cryptographic signing
- DMARC alignment policy to prevent spoofing
- Verify Google & Yahoo sender compliance
Domain & DNS Triage
Small businesses often have no idea where their domain registrar lives or who manages their nameservers. If your DNS is hosted at US Internet, your entire website and email could vanish.
- Identify registrar & rescue lost logins
- Extract complete DNS zone files
- Re-host nameservers on resilient cloud DNS
- Seamless MX & CNAME propagation
The "What We Don't Do" Policy (Scope & Disqualification Filter)
We believe in absolute transparency: Our team specializes in rapid, reliable migrations to Microsoft 365 and Google Workspace for small and mid-sized businesses, law firms, contractors, and professional practices.
"If your environment relies on legacy Cyphermail or complex on-prem archiving compliance architectures requiring an identical private cloud mirror, we will refer you to an enterprise archive specialist."
Standard compliance requirements (such as Microsoft 365 Purview Litigation Hold, retention policies, and Google Vault) are fully supported. However, we do not perform lift-and-shift deployments of bespoke, proprietary on-premise encrypted appliances.
The Turn-Key Cutover Playbook
A structured, calm engineering process that eliminates panic and minimizes business disruption.
Discovery & DNS Audit
We inventory every active mailbox, identify aliases, verify domain registrar access, and document all existing US Internet mail routing rules.
Tenant & Staged Sync
We provision your Microsoft 365 or Google Workspace organization and begin migrating gigabytes of historical email behind the scenes while your team keeps working.
Scheduled MX Cutover
At a scheduled off-hours window, we update your public MX and routing records. Inbound mail begins flowing directly into your new modern cloud tenant.
Auth & Deliverability Lock
We publish SPF, activate DKIM signing, set up DMARC monitoring, and provide step-by-step guidance to ensure your staff connects cleanly on Monday morning.
Request Your Migration Triage
A panicked office manager shouldn't have to fill out an 8-page form. Give us the core details, and a systems engineer will review your domain and reply with a clear cutover plan.
From the Twin Cities to Northern Virginia & Beyond
While US Internet's hosted mail services originated in the Minneapolis / Minnetonka metro area, thousands of organizations nationwide rely on their POP/IMAP and Securence filtering infrastructure.
Enuclea delivers 100% remote, zero-footprint migrations. Whether you are a manufacturing business in Minnesota, a law firm in Virginia, or a distributed team across the country, our engineering team handles tenant provisioning, DNS cutovers, and mailbox syncs with precision and zero on-site disruption.
Why Enuclea for Your Migration?
- Direct Engineer Communication: No tier-1 call center script readers. You speak directly with the engineer configuring your tenant.
- Modern Productivity Stacks: Full deployment of Microsoft 365 Business or Google Workspace with modern MFA security.
- Zero Email Loss: Staged synchronization ensures no message left behind in old USI POP/IMAP queues.
- Deliverability Hardening: Strict SPF, 2048-bit DKIM, and DMARC alignment dramatically reduce the risk of spoofing and help keep your invoices out of spam filters.
Frequently Asked Questions
Key details every business owner and office manager should know before the cutover deadline.
