Email Warm Up API For Deliverability & Inbox Placement

Automate warm-up, monitor sender reputation, and scale cold outreach with confidence. Integrate inbox protection directly into your workflow with Mailivery API.

Trusted partners

How to Get Started

Reach Out

Let us know your needs by scheduling a call. We'll explore how Mailivery’s API can support your strategy and goals.

Get API Access

Receive your API key and access our documentation. Test endpoints, add mailboxes, and start automating warm-up in minutes.

Launch and Support

Deploy your integration and scale with confidence. Manage unlimited inboxes, keep domains off blacklists, and protect every campaign from spam folder risks.

Why Choose

Mailivery API?

Dependable Technology

Our API is built on reliable infrastructure designed for high-volume agencies, SaaS platforms, and sales teams. Whether you’re managing 100 inboxes or 10,000, Mailivery delivers the performance, reliability, and uptime you need.

Never Pay Per Mailbox

Unlike other tools, our API seamlessly scales to support unlimited mailboxes, accommodating partners of all sizes without compromising costs and performance.

Robust API

Benefit from a straightforward integration process with our flexible and well-documented API, designed for quick deployment and backed by comprehensive support.

API features & Developer Workflow

Mailbox Connection

Support for SMTP, Gmail, Microsoft 365, SendGrid, and more.
Warm‑up control

Start, pause, adjust daily send volume, ramp‑up schedule.
Monitoring & metrics

Get health score, campaign activity logs, deliverability metrics.
Custom templates

Build warm‑up email templates for more realistic sender behavior
Webhook notifications

Receive real‑time alerts for mailbox connect/disconnects or warm‑up events.
Developer friendly

RESTful API,, clear error messages, full OpenAPI–style specs.

Use Cases For

API Partners

Cold‑Email Tools and CRMs

Integrate Mailivery’s email warm up API into your tool so users can prepare domains before launching campaigns. Boost deliverability, increase replies, and reduce churn by offering inbox placement protection as a native feature.

Marketing Agencies

Add Mailivery API into your email management services. Manage all client inboxes from one dashboard. Offer clients improved deliverability, warmer domains, and better ROI, and watch retention climb.

SaaS Startups

Add deliverability features to your platform without rebuilding from scratch. Mailivery’s API gives you enterprise-level infrastructure to offer warm up, monitoring, and reporting inside your own app.