Integrations
Cladiant + Smartlead
Real Google, Microsoft, and Azure mailboxes, provisioned and connected straight into Smartlead.
Smartlead is a cold email sending and warmup platform used by agencies to run outbound at scale.
Smartlead handles the sending, rotation, and warmup; Cladiant handles the infrastructure underneath it. We provision real Google Workspace, Microsoft 365, and Azure Entra mailboxes with SPF, DKIM, and DMARC written and verified before anything sends, then connect them straight into Smartlead.
You skip the CSV export and the manual per-inbox reconnect. Order mailboxes, and they arrive in your Smartlead account provisioned and authenticated, with dedicated Azure tenants so your sending reputation is never pooled with other senders.
The handoff
How Cladiant hands off to Smartlead
Cladiant connects your provisioned mailboxes to Smartlead with the sending username, password, and API key, plus a Microsoft OAuth link for Azure Entra inboxes, so accounts land in your Smartlead workspace ready to send.
Division of labor
Two layers, zero overlap
Smartlead runs the campaign. Cladiant runs the infrastructure it sends from. Neither does the other's job, which is exactly why they fit together.
Cladiant handles
- Google Workspace, Microsoft 365, and Azure Entra mailboxes
- Domain purchase plus SPF, DKIM, and DMARC on every domain
- A dedicated Azure Entra tenant per domain
- Deliverability monitoring that pulls a bad inbox to warmup
- Month-to-month billing on one invoice
Smartlead handles
- Campaign sequencing and multi-step follow-ups
- Built-in warmup and sender rotation
- Unified inbox for replies and analytics
- A/B testing and the API for GTM workflows
Setup
From order to sending
- 01
Tell us your volume
Say how many emails a day you need to send. We size the mailboxes and domains so no single inbox or domain is overloaded.
- 02
We provision and authenticate
Real Google Workspace, Microsoft 365, and Azure Entra mailboxes, with SPF, DKIM, and DMARC written and verified on every domain before anything sends.
- 03
Connect to Smartlead
We hand the accounts to Smartlead using the credentials it expects, including a Microsoft OAuth link for Azure inboxes, so they land in your workspace ready to send.
- 04
Set safe limits and launch
Cap daily volume per mailbox, keep warmup running, and keep bounces low. Your campaigns run; we keep the infrastructure healthy underneath.
Sizing it
How many mailboxes you need
A safe cold-email cadence is 20 to 40 sends per mailbox per day across a few mailboxes per domain, with new mailboxes warmed up over two to four weeks and bounce rate kept low. A target of 1,000 sends a day works out to roughly 30 to 40 mailboxes across a dozen or so domains, and Smartlead rotates across them for you.
What you get
Infrastructure built for the inbox
01
Three real providers
Google Workspace, Microsoft 365, and Azure Entra in one order, not a single-source SMTP relay.
02
Authenticated before sending
SPF, DKIM, and DMARC written and verified on every domain before a mailbox goes live.
03
Dedicated Azure tenants
Every Azure domain in its own tenant, so your reputation is never pooled with other senders.
Troubleshooting
When something goes wrong, who fixes it
Most cold-email problems are either a sequencer problem or an infrastructure problem. Here is how to tell them apart, and which layer owns the fix.
| Symptom | Likely cause | How it gets fixed |
|---|---|---|
| Emails landing in spam on seed tests | A DNS or authentication gap, or a blacklisted domain | Cladiant re-checks SPF, DKIM, DMARC and reputation, then remediates or replaces the domain |
| Reply rate declining over several weeks | Domain or inbox reputation wearing down | Cladiant rotates sending to rested mailboxes and warms the affected ones back up |
| Bounce rate climbing above 2 to 3 percent | List quality, not infrastructure | Pause and re-verify the list before sending more; suppress hard bounces in the sequencer |
| Good deliverability but low replies | Copy or targeting, not infrastructure | A/B test messaging in your sequencer; if a plain-text version also lands in spam, it points back to infrastructure |
| A sudden drop across many inboxes at once | A shared-reputation or tenant-level problem | Isolated Azure tenants contain the blast radius, so Cladiant investigates only the affected tenant |
FAQ
Smartlead + Cladiant, answered
Does Smartlead include mailboxes?
No. Smartlead is a sending and warmup platform, not an infrastructure provider, so you bring your own mailboxes. Cladiant provisions real Google Workspace, Microsoft 365, and Azure Entra mailboxes and connects them into Smartlead, so you get the sequencer and the infrastructure from one order.
Can I connect Google, Outlook, and Azure mailboxes to Smartlead?
Yes. Smartlead connects mailboxes over SMTP, IMAP, and Google or Microsoft OAuth. Cladiant hands over the sending username, password, and API key, plus a Microsoft OAuth link for Azure Entra inboxes, so all three providers land in your Smartlead workspace ready to send.
How do I connect Cladiant mailboxes to Smartlead?
Order your mailboxes and Cladiant provisions and authenticates them, then connects each account to Smartlead using the credentials it expects. There is no CSV import or per-inbox reconnect, so accounts arrive in your workspace ready to sequence.
How many mailboxes do I need for Smartlead cold email?
Plan for 20 to 40 sends per mailbox per day across a few mailboxes per domain. For 1,000 sends a day that is roughly 30 to 40 mailboxes across a dozen domains. Our free volume calculator sizes it for your exact target.
Do I still need to warm up mailboxes with Smartlead?
Yes. Smartlead has built-in warmup, and new mailboxes should warm for two to four weeks before full-volume sending. Cladiant mailboxes arrive authenticated and ready to warm; keep a 2-to-1 warmup-to-cold ratio while you ramp.
Will running Smartlead on Cladiant improve my deliverability?
Deliverability starts with the infrastructure underneath the sequencer. Real, authenticated mailboxes on dedicated Azure tenants, with SPF, DKIM, and DMARC verified on every domain, give Smartlead a clean base to send from, so a reputation problem on one inbox stays contained instead of dragging whole campaigns into spam.
Ready to run Smartlead on real infrastructure?
One order. One invoice. Mailboxes provisioned across three providers and connected straight into Smartlead.