Integrations
Cladiant + Apollo
Keep your Apollo sends out of spam with real, authenticated mailboxes.
Apollo is a sales intelligence and engagement platform with built-in email sequencing.
Apollo combines prospecting data with sequencing; Cladiant provides the mailboxes that keep your Apollo sends landing. Real Google Workspace, Microsoft 365, and Azure Entra accounts, authenticated and connected into Apollo.
Each Azure domain runs in its own dedicated tenant, so scaling your Apollo outbound does not mean sharing sender reputation with a pooled infrastructure provider.
The handoff
How Cladiant hands off to Apollo
Cladiant connects mailboxes to Apollo with the account username and password, so your sending accounts are ready inside Apollo.
Division of labor
Two layers, zero overlap
Apollo 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
Apollo handles
- Prospecting data and lead lists
- Built-in email sequencing
- Engagement analytics and intent signals
- CRM enrichment
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 Apollo
We hand the accounts to Apollo 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 Apollo 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
Apollo + Cladiant, answered
Does Apollo include sending infrastructure?
Apollo combines prospecting data with built-in sequencing, but it relies on the mailboxes you connect. Cladiant provisions real Google Workspace, Microsoft 365, and Azure Entra accounts and connects them into Apollo, so your data platform and your infrastructure work together.
Why are my Apollo emails going to spam?
Apollo sends from whatever mailboxes you attach, and spam placement usually traces to weak infrastructure rather than the tool. Cladiant provides authenticated mailboxes with verified SPF, DKIM, and DMARC on dedicated Azure tenants, which is what keeps Apollo sends landing in the inbox.
How do I connect Cladiant mailboxes to Apollo?
Cladiant connects mailboxes to Apollo with the account username and password, so your sending accounts are ready inside Apollo with no manual per-inbox configuration.
How many mailboxes do I need for Apollo outbound?
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. Use our free volume calculator to size it for your list.
Can I scale Apollo sending without hurting my domain reputation?
Yes, by spreading volume across isolated infrastructure. Each Azure domain runs in its own dedicated tenant, so scaling your Apollo outbound does not mean sharing sender reputation with a pooled provider or risking your primary domain.
Ready to run Apollo on real infrastructure?
One order. One invoice. Mailboxes provisioned across three providers and connected straight into Apollo.