Cold email remains the highest-ROI outbound channel for B2B — when done correctly. The majority of cold email programs fail on deliverability (landing in spam), relevance (generic copy that ignores the recipient's context), or follow-up (stopping after one email). Lumo builds cold email programs that land in the primary inbox, engage the right prospects, and generate meetings at scale.
The first failure mode is deliverability. Most companies send cold email from their primary domain at high volume — triggering spam filters and damaging domain reputation. The result: emails landing in spam folders that prospects never see. Proper cold email infrastructure uses dedicated sending domains, warmed-up mailboxes, and technical configuration (SPF, DKIM, DMARC) that maintains inbox placement regardless of volume.
The second failure mode is relevance. Generic cold emails — 'Hi [First Name], I saw you work at [Company] and wanted to reach out' — achieve reply rates below 1% because they offer no reason to respond. Effective cold email demonstrates specific research: a relevant trigger (recent funding, new hire, product launch), a pain point specific to the prospect's role, and a value proposition that maps directly to their context.
Lumo manages the full cold email stack: technical deliverability infrastructure, ICP-driven prospect research, highly personalised sequence writing, A/B testing of subject lines and opening lines, and reply management. We optimise for reply rate and meeting booking rate — the metrics that connect email activity to pipeline — not vanity metrics like email opens, which are increasingly unreliable due to iOS privacy protections.
Dedicated sending domain setup, DNS configuration (SPF, DKIM, DMARC), mailbox warmup, sending platform configuration (Instantly, Smartlead, Lemlist), and ongoing deliverability monitoring — ensuring consistent inbox placement.
ICP-based prospect identification, contact data sourcing, email verification, personalisation data enrichment (LinkedIn, company news, role context), and list segmentation by persona and messaging approach.
Personalised cold email sequence copy — subject line variants, opening line personalisation, value proposition, social proof, and CTA — with A/B testing of key variables and iteration based on reply rate data.
Inbox monitoring, reply categorisation (interested/not interested/bounce/wrong contact), personalised follow-up to positive replies, and meeting scheduling — ensuring no warm reply is missed or left without a timely response.
Send volume, delivery rate, open rate, reply rate, and meeting booking rate tracking by sequence, persona, and message variant — with weekly reporting and monthly sequence optimisation based on performance data.
Continuous prospect list refresh, sequence refresh every 60–90 days to prevent template fatigue, new persona testing, and outreach expansion as proven sequences are scaled across broader prospect universes.
Domain acquisition, DNS configuration, mailbox creation and warmup (3–4 weeks), sending platform configuration, and deliverability testing — achieving healthy sender reputation before any prospecting begins.
Prospect list build, personalisation data enrichment, sequence copy drafting with variants, and pre-send review — all completed before the first email is sent.
Controlled send volume ramp, reply monitoring from day one, weekly A/B test analysis, rapid iteration on underperforming subject lines and opening lines, and reply handoff to sales or meeting booking.
Increase volume on proven sequences, add new prospect segments, develop new sequence variants for different personas, and quarterly copy refresh to maintain reply rates as templates age.
Yes — cold email to business contacts is legal in the US under CAN-SPAM (which applies to commercial email) when you include a physical address, an unsubscribe mechanism, and accurate sender information. GDPR applies to EU prospects; CASL applies to Canadian prospects — both have stricter consent requirements. Lumo configures cold email programs to comply with all applicable regulations and removes unsubscribe requests immediately. Never send cold email to consumer Gmail, Yahoo, or personal email addresses.
Industry benchmarks: a poorly run cold email program achieves 0.5–2% reply rate. A well-run program with personalisation and good deliverability achieves 3–8% reply rate. Best-in-class programs with highly personalised, trigger-based opening lines achieve 8–15% reply rate. Lumo targets 3–8% reply rate in the first 90 days, with improvement toward 8–12% as sequence data matures and we understand which personas and messages perform best.
Domain registration and DNS configuration: 1–2 days. Mailbox warmup: 3–4 weeks (non-negotiable — skipping warmup causes immediate deliverability damage). Prospect list build and copy development: 1–2 weeks in parallel with warmup. First emails send in week 4–5 from kickoff. Lumo begins infrastructure setup and research simultaneously so the program is ready to launch as soon as mailboxes are warmed.
Cold email sent at volume from your primary domain (yourcompany.com) risks damaging your primary domain's sender reputation if spam complaints occur. This can cause your transactional emails (receipts, onboarding, support) and marketing emails to start landing in spam — a serious business problem. Lumo uses dedicated cold email sending domains (youcompany-outreach.com, meetyourcompany.com) that are isolated from your primary domain's reputation.
Per mailbox, safe sending volume is 30–50 emails per day — above this threshold, deliverability begins degrading. To scale volume, Lumo uses multiple warmed-up mailboxes across multiple sending domains, distributing volume across the infrastructure. A program using 5 mailboxes across 2 domains can safely send 150–250 emails per day while maintaining inbox placement.
Get a free cold email audit — we'll test your current deliverability, review your sequence copy, and show you exactly what's preventing your emails from generating the reply rates your business needs.
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