Instantly provision secondary mailing domains with 3 dedicated inboxes per domain. Automated SPF, DKIM 2048-bit, DMARC, Custom Tracking Domains, and 1-click export into Instantly & Smartlead.
Send Coldy is a specialized cold email infrastructure platform that hosts secondary mailing domains with 3 dedicated email accounts per domain. It automates 2048-bit DKIM, SPF, DMARC, and Custom Tracking Domains to protect primary domain reputation, reduce inbox costs to ~$2.30/inbox, and natively sync with outbound sales sequencers.
Stacking 10+ accounts on one domain causes algorithmic domain blacklisting. Sending 100 emails/day from one inbox burns your IP. Here is why 3 inboxes per domain is the deliverability gold standard.
Sending strictly 12 cold emails daily per inbox keeps your domain completely beneath ESP automated filtering algorithms. With 3 inboxes, you safely send 36 emails per domain daily—indistinguishable from natural human 1-on-1 communication.
Distributing outreach across multiple personas (e.g. alex@, sarah@, team@) creates an authentic human sender profile while isolating sender scores so one spam complaint won't sink your company.
Bundling 3 inboxes per secondary domain reduces your per-inbox overhead to as little as $2.00/mo. You get 3x the sending capacity for less than half the cost of standard Google Workspace licenses.
No more copying & pasting cryptic TXT, MX, and CNAME records into Cloudflare or Namecheap. Send Coldy generates and verifies 100% compliant email authentication instantly.
Simulating active records provisioned for your secondary mailing domains:
| Protocol | Type | Host / Name | Value / Configuration Target | Status |
|---|---|---|---|---|
| DKIM (2048-bit) | TXT | sc1._domainkey |
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3x9...sendcoldy |
Pass (2048b)
|
| SPF Alignment | TXT | @ |
v=spf1 include:_spf.sendcoldy.com ~all |
Aligned
|
| DMARC Policy | TXT | _dmarc |
v=DMARC1; p=quarantine; rua=mailto:dmarc-reports@sendcoldy.com; pct=100 |
Quarantine 100%
|
| Mail Routing | MX | @ |
10 mx1.sendcoldy.com / 20 mx2.sendcoldy.com |
Isolated IP
|
| Custom Tracking (CTD) | CNAME | track |
track.leadreach-outbound.com CNAME ctd.sendcoldy.com |
SSL Enabled
|
Drag the slider to your desired daily cold email volume. See the exact infrastructure setup recommended and how much money you save compared to Google Workspace.
Based on our ultra-deliverability safety limit of 12 cold emails/inbox/day (36/domain).
Why sales teams, outbound agencies, and enterprise SDR teams are moving away from manual Google Workspace setups.
| Feature / Capability | ⚡ Send Coldy | Google Workspace | Microsoft 365 |
|---|---|---|---|
| Price Per Inbox | $2.00 – $3.00 / mo | $7.20 / mo (Starter) | $6.00 / mo (Basic) |
| 3 Inboxes Per Domain Architecture | Built-in Native Standard | Manual Setup | Manual Setup |
| Automated SPF, DKIM 2048b, DMARC | 60-Second 1-Click Auto | 20+ min manual DNS copy/paste | Complex PowerShell or manual |
| TOS Risk for Cold Outbound | 100% Compliant & Engineered | Strict ban risk for bulk cold email | Constant tenant locks |
| Custom Tracking Domain (CTD) SSL | Automated with Free SSL | Requires 3rd party reverse proxy | Manual Azure setup |
| 1-Click Export to Instantly / Smartlead | Native CSV & API Sync | 2FA / App password hurdles | SMTP AUTH admin hurdles |
| Automated Reply Catch-All Forwarding | Included Free | Complex routing rules | Transport rule setup |
A comprehensive infrastructure layer built from the ground up to solve cold email deliverability.
Manage 5 or 500 domains from a single interface. Add new lookalike domains, generate inboxes, and view health statuses with zero tab juggling.
Prospect replies are automatically routed to your core primary email or CRM inbox. Never miss a warm lead while keeping your secondary domains anonymous.
24/7 automated monitoring across Spamhaus, Barracuda, and SORBS. Get real-time alerts if an individual domain or IP health metric dips.
All plans include 3 dedicated inboxes per domain, automated DNS authentication, and universal sequencer compatibility.
For solo founders, SDRs, and early-stage startups launching cold outreach.
For growing sales teams and lead generation agencies scaling pipeline.
For high-velocity outbound teams and multi-client cold email agencies.
For enterprise sales organizations & agencies managing 10+ outbound clients.
From zero to sending warm outbound campaigns with 1-click simplicity.
Connect domains you own (via Cloudflare, Namecheap, GoDaddy) or pick available lookalike domains with 1 click.
Send Coldy provisions 3 dedicated accounts per domain with 2048-bit DKIM, SPF, DMARC, and Custom Tracking automatically.
Export inboxes directly via pre-formatted CSV or 1-click webhook sync. Enable warm-up and start booking pipeline meetings.
Everything you need to know about cold email infrastructure, DNS authentication, and deliverability.
Send Coldy is a dedicated cold email infrastructure platform that provisions secondary mailing domains with 3 dedicated email accounts per domain. It automatically configures 2048-bit DKIM, SPF, DMARC, and Custom Tracking Domains to guarantee maximum inbox placement and protect your primary company domain.
Send Coldy strictly limits outbound capacity to 12 emails per mailbox per day (totalling 36 emails per domain daily across 3 accounts). Sending 50-100 emails/day from a single inbox triggers Google and Microsoft bulk spam heuristics within weeks. By capping outbound to 12 emails/day, your sending profile is completely indistinguishable from human 1-to-1 conversation, preserving 99.9% primary inbox placement for years.
Yes! Every inbox provisioned on Send Coldy includes dedicated IMAP and SMTP credentials. We provide 1-click CSV exports formatted specifically for Smartlead, Instantly, Lemlist, Woodpecker, and Salesforge with zero manual credential formatting required.
Cold outreach should never be sent from your primary domain (e.g. company.com). Send Coldy provisions lookalike secondary domains (e.g. trycompany.com or getcompany.com) hosted on isolated IP pools. If any secondary domain ever receives spam flags, your primary domain and daily corporate email operations remain 100% safe.
Yes, completely automated. Send Coldy generates enterprise-grade 2048-bit DKIM private keys, strict SPF include mechanisms, and DMARC quarantine policies. In addition, Custom Tracking Domains (CTD) with automated SSL certificates are generated to eliminate spam filters triggered by generic shared tracking pixels.
Send Coldy includes automated reply forwarding and catch-all routing. Any email reply sent to your secondary accounts is instantly forwarded to your primary business inbox, HubSpot, or Salesforce CRM so your SDRs can respond without logging into multiple webmail portals.
Yes. You can connect domains you've already purchased on Cloudflare, Namecheap, GoDaddy, or Porkbun with 1-click nameserver delegation. We also provide turnkey domain provisioning directly inside the platform if you prefer a hands-off setup.
With Send Coldy, you are never locked into permanent domain burns. If a domain reputation drops, you can delete the domain and provision a replacement domain and 3 new inboxes instantly from your dashboard without contacting support.