Ecommerce Partnership Outreach, Run Through Mailshake
Cold email for an ecommerce brand has nothing to do with customer marketing. Klaviyo flows, abandoned-cart emails, and order confirmations stay exactly where they are — on your brand's primary domain. Cold outreach is the B2B side of the business: pitching retail buyers to get stocked, recruiting creators and affiliates, opening supplier negotiations, and landing bulk B2B orders.
Mailshake is where those campaigns live — the sequences, the mail merge personalization, the Lead Catcher inbox where replies turn into deals. ColdRelay is the infrastructure underneath: the secondary domains, mailboxes, and dedicated IPs that Mailshake actually sends from. This guide covers how ecommerce teams wire the two together without ever putting their store domain at risk.
Why Run Mailshake on ColdRelay Infrastructure
Mailshake is a sending and sequencing platform — it sends from whatever mailboxes you connect to it. It doesn't provision domains, configure DNS, or own the deliverability of the mailboxes themselves. That's the infrastructure layer's job, and for an ecommerce brand the stakes on that layer are unusually high: the same domain reputation that decides whether a buyer at a retail chain sees your pitch also decides whether your customers receive shipping confirmations.
ColdRelay solves that by keeping the two worlds physically separate. Your partnership outreach runs on secondary domains provisioned on isolated Azure tenants with dedicated IPs, fully DNS-configured (SPF, DKIM, DMARC) and ready in about an hour. Your store domain — and everything Klaviyo or your transactional provider sends from it — never touches a cold campaign.
The pairing is additive, not competitive: ColdRelay is the infrastructure, Mailshake is the sender on top. You keep Mailshake's campaign builder, mail merge, and Lead Catcher — you just give it mailboxes built to land in a buyer's inbox.
Visit Mailshake →Connecting ColdRelay Mailboxes to Mailshake
Provision mailboxes on ColdRelay
Pick secondary domains close to your brand but separate from your store — if you sell on getbrand.com, something like brandpartners.com or brandwholesale.com. ColdRelay supports 100-150 mailboxes per domain; most ecommerce teams start with 20-100 mailboxes across 1-2 domains. Everything provisions on isolated Azure tenants with dedicated IPs in about an hour, with SPF, DKIM, and DMARC already configured.
Connect the mailboxes in Mailshake
In Mailshake, go to Mail Accounts and add each ColdRelay mailbox via SMTP/IMAP using the credentials from your ColdRelay dashboard export. Each mailbox connects as its own sending account, so Mailshake can distribute campaign volume across the full pool.
Set sending limits to match the ColdRelay budget
Cap each mailbox at 2 outbound emails per day in Mailshake's sending settings. That mirrors ColdRelay's per-mailbox budget — 4 sends/day total, split 2 outbound + 2 warmup. Warmup runs continuously on ColdRelay's side, so there's no separate warmup period before you launch and nothing extra to configure in Mailshake.
Build the campaign with mail merge personalization
Use Mailshake's campaign builder to create one sequence per outreach motion — retail buyers, creators, affiliates, suppliers. Upload your list as a CSV and lean on mail merge fields beyond first name: store name, product category, follower count, the retailer's current assortment gap. A buyer can tell a templated pitch from fifty feet.
Work replies in Lead Catcher and follow up by phone
Mailshake's Lead Catcher surfaces real replies and filters out the noise, so warm buyer and creator responses don't sit unanswered. For high-value retail accounts, use Mailshake's integrated dialer to follow an interested reply with a same-day call — wholesale deals close on conversations, not threads.
The Ecommerce Mailshake Playbook
Keep customer email and cold email on different domains
This is the rule everything else hangs on. Klaviyo flows, receipts, and shipping updates stay on your store domain. Every cold sequence in Mailshake runs from ColdRelay secondary domains — so a spam complaint from a buyer prospect can never dent the reputation your order confirmations depend on.
Pitch retail buyers with sell-through math, not brand story
Buyers at chains and boutiques care about margin, velocity, and proof. Lead with a one-line traction stat — units/month on your own store, sell-through at an existing stockist — and a low-friction ask: a sample box or a 10-minute line review. Save the founder story for the call.
Run creator and affiliate recruitment as separate campaigns
Creators respond to different hooks than buyers — commission structure, free product, audience fit. Keep them in their own Mailshake campaigns with their own mail merge fields (handle, niche, follower count) so copy and reply-rate benchmarks stay clean. The ColdRelay mailbox pool is shared; the messaging never is.
Match send capacity to your account list, not the other way around
Partnership outreach is a finite-universe game — there are only so many relevant buyers, distributors, and creators in your category. At 2 outbound sends/day per mailbox, 25 mailboxes gives you 50 personalized sends a day, which covers most brands' realistic account lists. Scale mailboxes on ColdRelay when you expand into new categories or regions, not just to send more.
Typical Ecommerce Partnership Outreach Benchmarks (Mailshake + ColdRelay)
| Metric | Benchmark | Notes |
|---|---|---|
| Inbox placement rate | 95%+ | Dedicated IPs and isolated tenants outperform shared Google/Microsoft pools |
| Reply rate — creator/affiliate outreach | 3-8% | Creators reply readily when the commission and product fit are clear up front |
| Reply rate — retail buyer outreach | 2-4% | Buyers are slower; persistence and a sample offer move the number |
| 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 campaign setup in Mailshake |
What It Costs: Mailshake + ColdRelay
You pay per mailbox per month for the infrastructure, with volume tiers that drop as you scale (see the table below). DNS, IPs, and isolated Azure tenants are included.
Mailshake is billed separately on its own subscription for campaigns, mail merge, Lead Catcher, and the dialer — priced per its current plans.
Infrastructure cost scales with mailbox count; Mailshake's cost scales with seats. The two stack cleanly — one bill for sending capacity, one for the sending software — and neither touches your Klaviyo or transactional email spend.
| 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; Mailshake handles the sending, sequencing, and inbox rotation on top.
Frequently Asked Questions
Does ColdRelay replace Mailshake?
No. They do different jobs and you use them together. Mailshake handles campaigns, mail merge personalization, Lead Catcher reply management, and the dialer. ColdRelay provides the underlying secondary domains, mailboxes, and dedicated IPs that Mailshake sends from.
Will cold outreach hurt the domain my store and Klaviyo emails send from?
Not when the mailboxes come from ColdRelay. Partnership outreach runs entirely on separate secondary domains, dedicated IPs, and isolated Azure tenants — completely walled off from the primary domain your order confirmations, shipping updates, and marketing flows depend on.
Is this for emailing our customers?
No — never send cold email to your customer list, and never run customer marketing through cold infrastructure. Cold outreach for ecommerce is B2B: retail buyers, distributors, creators, affiliates, and suppliers. Customer email stays in Klaviyo (or your ESP) on your primary domain.
How many mailboxes does an ecommerce brand need in Mailshake?
Less than you'd think. Each mailbox sends 4 emails/day total — 2 outbound + 2 warmup — so 25 mailboxes gives you 50 outbound sends/day, enough to work most category buyer and creator lists with real personalization. Brands running broad affiliate recruitment across multiple niches typically scale to 50-100 mailboxes on ColdRelay.