Agency New-Business Outreach, Run Through Lemlist
SEO agencies have an unfair advantage in cold email: the prospect's problem is publicly visible. A site losing rankings, a blog with thin content, a competitor outranking them for their own brand terms — you can see it before you ever send the first email. Lemlist is built to weaponize that visibility, with liquid syntax variables, personalized images, and landing pages that put a mini-audit in front of every prospect.
What Lemlist doesn't provide is the sending infrastructure underneath. That's ColdRelay's job: the secondary domains, mailboxes, and dedicated IPs that your Lemlist sequences actually send from. This guide covers how SEO agencies wire the two together — provisioning infrastructure on ColdRelay, connecting it to Lemlist, and building the audit-led sequences that book discovery calls.
Why Run Lemlist on ColdRelay Infrastructure
If you run an SEO agency, you already understand domain reputation better than almost any other buyer of cold email infrastructure. You spend your days protecting clients' domain authority — so you know exactly why blasting cold outreach from your agency's primary domain is a bad trade. One spam-folder spiral and the domain you use for client reporting, link outreach, and referral intros takes the hit.
ColdRelay solves that the way you'd advise a client to: separation. You provision secondary domains and mailboxes on isolated Azure tenants with dedicated IPs, fully DNS-configured (SPF, DKIM, DMARC) and ready in about an hour. There's no warmup waiting period before you can send — warmup runs continuously as part of each mailbox's 4 sends/day budget (2 outbound + 2 warmup).
Lemlist sits on top as the sending and personalization layer: sequences, liquid syntax variables, personalized images, multichannel steps. ColdRelay is the infrastructure underneath. The pairing is additive, not competitive — you keep everything that makes Lemlist good at agency outreach, and you give it mailboxes built to land.
Visit Lemlist →Connecting ColdRelay Mailboxes to Lemlist
Provision mailboxes on ColdRelay
Pick secondary domains adjacent to your agency brand — never your primary domain. ColdRelay supports 100-150 mailboxes per domain; most agencies start with 20-100 mailboxes across 1-2 domains depending on how many discovery calls they want per month. Everything provisions on isolated Azure tenants with dedicated IPs in about an hour, with SPF, DKIM, and DMARC pre-configured.
Export credentials and connect them in Lemlist
Export your mailbox list with SMTP/IMAP credentials from the ColdRelay dashboard. In Lemlist, go to Settings → Email Accounts and connect each mailbox via custom SMTP/IMAP. Lemlist treats each as its own sending identity, so replies route back to the right inbox.
Set sending limits to match the ColdRelay budget
In each Lemlist email account's sending settings, cap daily sends at 2 outbound emails per mailbox. That mirrors ColdRelay's per-mailbox budget — 4 sends/day total, split 2 outbound + 2 warmup. Skip Lemlist's lemwarm add-on for these mailboxes; ColdRelay's warmup already runs continuously, and double-warming wastes budget.
Build the audit assets with liquid syntax and personalized images
Create your campaign and set up custom variables for each prospect — {{currentRanking}}, {{lostKeyword}}, {{competitorName}} — populated from your audit CSV. Then use Lemlist's personalized image feature to drop a mini-audit screenshot (a ranking-drop graph or site-health score) into the email with the prospect's domain rendered on it. For higher-value targets, build a Lemlist personalized landing page that hosts the fuller teardown.
Add LinkedIn steps and launch the multichannel sequence
Use Lemlist's multichannel sequence builder to add a LinkedIn profile visit before email 1 and a LinkedIn message after email 2 — marketing decision-makers live there, and the visit warms name recognition before the audit lands. Attach all connected ColdRelay mailboxes to the campaign and let Lemlist rotate sends across them.
The SEO Agency Lemlist Playbook
Lead with the teardown, not the pitch
Your opener should prove you already looked: name the specific keyword they slipped on, the page with the cannibalization issue, or the competitor outranking them. Lemlist's liquid syntax lets you template the structure while every email reads hand-written. An audit-led opener routinely doubles reply rates over a generic capabilities pitch.
Make the proof visual
A sentence saying 'your organic traffic dropped' is a claim; a personalized image of their ranking curve is evidence. Use Lemlist's personalized images to embed a per-prospect audit snapshot, and reserve personalized landing pages for prospects worth a full mini-audit — the click-through itself is a strong intent signal to prioritize for follow-up.
Sell the discovery call with a ranking case study
SEO buyers have been burned by agencies before, so the CTA that converts is low-friction and proof-backed: a 20-minute walkthrough of the full audit, anchored by one relevant case study ('we moved a B2B SaaS site from page 3 to position 4 for their money keyword in 5 months'). Match the case study vertical to the prospect segment per campaign.
Practice the separation you preach
You'd never tell a client to risk their primary domain on mass outreach — apply the same discipline to your own. Every cold sequence runs from ColdRelay secondary domains; your agency's primary domain stays reserved for client reporting, link-building outreach, and referrals, with zero exposure to outbound reputation risk.
Typical SEO Agency Outbound Benchmarks (Lemlist + ColdRelay)
| Metric | Benchmark | Notes |
|---|---|---|
| Inbox placement rate | 95%+ | Dedicated IPs and isolated tenants outperform shared Google/Microsoft pools |
| Reply rate | 3-7% | Audit-led openers with personalized images outperform generic agency pitches |
| Discovery calls per 1,000 sends | 8-20 | Higher when the personalized landing page hosts a genuine mini-audit |
| Outbound capacity per mailbox | 2/day | 4 sends/day total per mailbox — 2 outbound + 2 warmup |
| Time to first campaign | Same day | ~60 minutes to provision, plus audit-asset and sequence setup in Lemlist |
What It Costs: Lemlist + ColdRelay
You pay per mailbox per month for the infrastructure, with volume tiers that drop as you scale (see the table below). DNS, dedicated IPs, and isolated Azure tenants are included.
Lemlist is billed separately on its own per-seat subscription for sequencing, personalized images and landing pages, and multichannel steps — priced per its current plans.
Infrastructure cost scales with mailbox count; Lemlist's cost scales with seats. For an agency, both are line items that price into your client acquisition cost — one bill for sending capacity, one for the personalization software on top.
| Mailboxes | ColdRelay price / mailbox / month |
|---|---|
| 1–199 | $1.00 |
| 200–999 | $0.85 |
| 1,000–4,999 | $0.70 |
| 5,000+ | $0.55 |
Each mailbox sends 4 emails per day — 2 outbound to prospects + 2 warmup. ColdRelay provisions mailboxes on isolated Azure tenants with dedicated IPs; Lemlist handles the sending, sequencing, and inbox rotation on top.
Frequently Asked Questions
Does ColdRelay replace Lemlist?
No — they're complementary layers. Lemlist handles sequencing, liquid syntax personalization, personalized images and landing pages, and LinkedIn steps. ColdRelay provides the underlying domains, mailboxes, and dedicated IPs that Lemlist sends from. You use them together: infrastructure below, sending and personalization on top.
Will cold outreach hurt my agency's own domain authority or email reputation?
Not when the sending runs on ColdRelay. Your sequences go out from separate secondary domains on isolated Azure tenants with dedicated IPs — completely walled off from the primary domain you use for client work, reporting, and link outreach. It's the same separation principle you'd recommend to a client, applied to email reputation.
Should I use lemwarm with ColdRelay mailboxes?
Generally no. ColdRelay mailboxes warm continuously as part of their built-in budget — each mailbox sends 4 emails/day total, split 2 outbound + 2 warmup. There's no warmup waiting period before you can start sending, and adding lemwarm on top would double-warm without improving placement. Point Lemlist at outbound sending only.
How many mailboxes does an SEO agency need to fill its pipeline?
Work backwards from discovery calls. At 2 outbound sends/day per mailbox, 25 mailboxes gives 50 sends/day — roughly 1,000-1,100 sends/month, which at typical audit-led conversion rates yields 8-20 discovery calls. Most agencies start at 20-50 mailboxes and scale on ColdRelay (up to 100-150 mailboxes per domain) as close rates prove out.