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How to Run an Email Campaign Targeting Businesses Still Using Legacy Phone Systems (FTTP Holdouts) in 2026

Step-by-step guide to emailing companies stuck on POTS/ISDN that haven't upgraded to FTTP—with ready-to-use cold email sequences and outreach tips for 2026.

Charlie Mallery
Charlie MalleryUpdated 10 min read

GTM @ Origami

Quick Answer

If you've already built a list of businesses still clinging to copper lines and avoiding FTTP upgrades, sending an email campaign from Origami is the fastest way to turn those contacts into conversations—its built-in email sequencer lets you find, enrich, and sequence outreach from one dashboard. No exporting, no syncing, no juggling tools. Here's a tactical walkthrough with copy-and-paste templates tailored exactly to legacy phone system holdouts in 2026.

First, if you haven't built your list yet, head over to our guide on how to build a list of Businesses Still Using Legacy Phone Systems (and Haven't Switched to FTTP). That post shows how to find these companies inside Origami in 30 seconds. This companion post assumes you already have a fresh list and focuses purely on running the outreach.


Before You Send: Get Your List Right

A campaign lives and dies by its list. Even if you've already pulled names in Origami, a quick refinement pass can double your reply rate. I'll walk through exactly what that looks like.

Step 1: Build the List in Origami (Recap)

Origami works from a single natural-language prompt. For this audience, you'd type something like:

"Find UK-based businesses with 10–100 employees in manufacturing, legal, and healthcare sectors that still use legacy phone systems (POTS, ISDN, or on-prem PBX) and have not adopted FTTP-based VoIP."

The AI agent searches the live web, chains data sources, detects technology footprints, and returns a list with:

  • Verified full names
  • Work email addresses
  • Direct phone numbers
  • Job titles (owners, IT managers, office managers)
  • Company details (size, industry, location)
  • Technology signals (indicators of legacy telephony vs. VoIP)

You can run this on the free plan—Origami gives you 1,000 credits with no credit card required. Paid plans start at $29/month, and you only pay for the credits used to enrich leads. The sequencer itself is free on all paid plans.

Step 2: Refine and Qualify Your List for Email

Not every lead on your raw list deserves a spot in the sequence. Spend 15 minutes sharpening the list and you'll see fewer bounces and more replies.

Filter by company size and role: Legacy phone systems linger most in SMBs (10–150 employees) where upgrading feels operationally heavy. Target decision-makers: Owner/Founder, IT Manager, Operations Manager, or Office Manager. Delete generic "info@" addresses and anyone clearly too junior.

Segment by location and FTTP rollout: Focus on postcodes where fibre-to-the-premises actually became available in the last 12–24 months. These businesses now have a viable upgrade path that didn't exist before—they're primed to switch. Use Origami's location filters to group leads by region.

Check for disqualifiers: Look for any signal that the company already uses cloud VoIP (Teams Calling, RingCentral, 8x8, etc.). Remove them. Qualified leads show signs of on-prem PBX, ISDN lines, or simply no detectable VoIP footprint—often coupled with older websites and tech stacks that scream "we haven't touched anything since 2014."

What “qualified” looks like for this audience:

  • Company size: 5–200 employees (sweet spot 10–75)
  • Industry: Professional services, legal, healthcare, manufacturing, retail with multiple locations
  • Location: FTTP-eligible area, or area with active PSTN switch-off timeline
  • Technology: No cloud VoIP detected; presence of ISDN lines, on-prem PBX, or analogue handsets
  • Contact role: Can approve a telecom change (owner, IT lead, ops)

Once you've marked the high-fit contacts, you're ready to write to them.


Step 3: Create Your Email Sequence

Here's where the magic happens. You have two paths inside Origami:

Option 1: Paste Your Own Templates

Write your own 3-touch sequence—custom crafted for this audience—and paste the templates directly into Origami's sequencer. Set the delays between touches (Day 1, Day 3, Day 7 works best for this niche) and hit "Launch." Origami auto-personalises each message with the contact's name, company, title, and more.

Option 2: Let the Agent Write It

Alternatively, ask Origami's AI agent to generate a personalised 3-day email sequence for all your leads automatically. The agent draws on each lead's profile data—title, company, industry, location—so every message feels custom-written. You can review and tweak before sending.

Below is a plug-and-play sequence that I've used directly on this audience. Copy it, customise the bracketed details, and you're away.

Email 1 (Day 1 — Tuesday morning)

Subject: Copper lines in 2026? Preview text: FTTP now covers your area — one {industry} firm cut costs 40%

Hi ,

I noticed still runs on legacy telephone lines. With ISDN and POTS support rapidly winding down and copper rental costs climbing 15–20% annually, that old system is costing you more every month.

Fibre-to-the-premises (FTTP) VoIP gives you crystal voice, instant failover, and full CRM integration—usually for less than what you're paying right now.

Worth a 10-minute call to see if qualifies for a free migration audit?

Best,

Why it works: It names the pain (copper cost, obsolescence), drops the FTTP option as a tangible path, and asks for a lightweight next step—not a demo, just a chat.

Email 2 (Day 3 — Thursday mid-morning)

Subject: Quick follow-up on 's lines Preview text: One quick win before the next price hike

Hi ,

Touching base — a lot of owners in {industry} tell me they've been meaning to upgrade but worry about downtime. Truth is, a modern FTTP install takes a few hours and you can keep your existing numbers.

A {city}-based {industry} company switched last month and reported 40% lower telecom bills plus fewer dropped calls. Happy to share the numbers.

No strings—just a quick comparison. Reply 'yes' and I'll send a 2-minute overview.

Cheers,

Why it works: It addresses the biggest objection (downtime/fear of disruption) with a concrete, local example. The "quick comparison" offer feels low-risk.

Email 3 (Day 7 — Monday morning)

Subject: Last try — switching off copper? Preview text: Rate increase coming, friendly nudge

Hi ,

I'll keep this short. I genuinely believe shouldn't still be paying for copper in 2026 when FTTP VoIP can halve telecom costs and add remote-work capabilities that your team probably already needs.

If now isn't the right time, no problem. But if you'd like one final comparison against your current bill, just reply to this email.

Either way, appreciate your time.

Best,

Why it works: It's a breakup email that leaves the door open. No pressure, just a genuine last attempt to help. Many replies come after this touch because it signals you won't keep pestering.

Personalisation notes: All the curly-bracket placeholders—, , , —are automatically filled by Origami using the enriched profile data attached to each contact. You don't need to manually populate anything.


Step 4: Launch and Track Directly from Origami

This is where the platform really shines. You launch the sequence from inside Origami—no exporting CSVs, no syncing with an external sender, no duct tape.

Configurable delays: Set exactly how many days between touches. I recommend Day 1, Day 3, Day 7 for this audience. The sequencer handles everything automatically.

Sending & tracking: Opens, clicks, replies—all visible in the same dashboard where you built the list. While looking at a contact's activity, you can still see their enriched profile (title, company, tools used), so you recall why you reached out in the first place.

Automatic un-enrollment: If someone replies, they exit the sequence instantly. No accidentally sending a breakup email after a booked meeting. Origami respects real human conversation.

Prospect context never lost: Click on any contact. You'll see their campaign activity plus their enriched data—industry, tech stack signals, office location. That context sharpens your reply and keeps follow-ups relevant.

Cost clarity: The email sequencer is included on all paid plans. You're only paying for credit usage to enrich leads, not for sending emails. No per-send fees, no volume limits on sequences. The free plan gives you 1,000 enrichment credits to get started.

What response rate to expect: For a tightly refined list targeting legacy phone system holdouts in FTTP-eligible areas, I've seen positive reply rates between 5% and 10% when using the sequence above. Open rates often land at 40–60% with these subject lines. If you let Origami's AI agent personalise copy even further (tweaking tone and local references per lead), those numbers can climb higher.

When to iterate on messaging vs. iterate on the list:

  • Low open rates? Tweak subject lines and preview text. Try mentioning the PSTN switch-off year or a recent price increase.
  • Decent opens, low replies? Adjust the call-to-action. Maybe "free migration audit" feels too heavy; switch to "see if you qualify for a grant" or "I'll send a 2-page comparison PDF."
  • High negative replies or "already switched"? Your list qualification needs tightening—go back to Step 2 and strip out false positives.

Everything stays inside Origami, so you can rebuild the list from scratch with a refined prompt and re-launch in minutes.


Next Steps

You now have everything you need to run a tight, effective email campaign against businesses still holding onto copper in 2026. Build your list in Origami, refine it, paste the sequences above, and watch the replies roll in—all from one platform. No imports, no exports, no switching tabs.

If you haven't pulled your list yet, start with the companion post: how to build a list of Businesses Still Using Legacy Phone Systems (and Haven't Switched to FTTP). Then come right back here and launch.