ColdMailServer
B2B Partnerships

The Outbound Email Backend for Sales Platforms.

Scale your outreach tool, CRM, or sequencing product. Embed isolated mail servers, pre-warmed IP blocks, and automated DNS alignments directly into your application via our API.

app.coldmailserver.com
API Provisioning Metrics● Gateway Live
Active Integration Nodes32 Dedicated Clusters
API Requests (Past 24h)2.4M successful relays
Average Response Time48ms gateway latency
B2B Programmatic API management dashboard
Target Partners

Who integrates with Cold Mail Server?

We provide the high-performance delivery backend so you can focus on building your software.

Outreach & Sequencing Tools

Give your users pre-configured, pre-warmed inbox options natively. Embed SMTP/IMAP account creation directly into your workspace setup flow.

CRM & Sales Platforms

Allow customers to send high-volume sales outreach without redirecting them to third-party providers. Keep all client data inside your ecosystem.

High-Volume GTM Agencies

Automate client infrastructure provisioning. Spin up dedicated, white-labeled SMTP relay systems programmatically as clients onboard.

API Features

Programmatic Outbox Control

RESTful Provisioning API

Create, configure, and delete isolated server environments, sending domains, and mailboxes programmatically using standard HTTP requests.

White-Label Domain Masking

Maintain your brand. Custom SMTP endpoints, MX records, and tracking configurations can be masked to carry your own brand domain names.

Real-Time Webhook Telemetry

Get instant callbacks for deliverability events: bounces, spam complaints, DKIM/SPF alignment statuses, and message feedback loops.

Partner Integration Specifications

Built on robust developer protocols to fit easily into modern tech stacks:

Provisioning REST APICreate mailboxes, verify DNS records, fetch logs programmatically via JSON payloads.
Global Delivery EdgeDistributed multi-region SMTP servers to ensure minimal delivery latency worldwide.
Pre-Warmed IP RotationProgrammable IP pool assignment to isolate or rotate accounts based on traffic quality.
Compliance & Safety GatewayReal-time outbox filters to prevent outgoing spam, protect IP pools, and flag bad user templates.
0.00%API Endpoint Uptime
< 0msWebhook Callback Latency
> 0kAPI Accounts Provisioned

Let's build your outreach backend together

Discuss custom white-label setups, high-volume endpoint limits, and pricing integration models with our infrastructure team.

Book an Integration CallSchedule a Demo