Email Warmup Api
Integrate Deliverability In Your Product
Integrate automated email warmup directly into your platform, CRM, or client workflow. Our API gives developers and agencies programmatic control over inbox warming — without any manual setup or dashboard switching.
Trusted by 1000+ companies
Built To Scale With Your
Infrastructure
Managing five inboxes is one thing. Managing fifty — or five hundred — requires automation
The Email Warmup API eliminates the manual work of warming client accounts individually, letting you onboard inboxes programmatically and track deliverability across your entire portfolio from a single integration.
Agencies use it to protect client domains without logging into separate dashboards. SaaS platforms embed it as a native feature (users never leave your product). Sales teams connect it to their CRM for hands-off warm-up alongside outreach automation.
Core Functionality of Our API
The API handles everything the dashboard does — plus webhook notifications for real-time alerts. Full endpoint documentation is available after signup — the integration typically takes under an hour for experienced developers.
| Inbox connection | Add mailboxes via API key authentication |
| Warmup control | 100% B2B client focus, relevant case studies |
| Reputation tracking | DMARC/BIMI/SPF/DKIM knowledge, warm-up processes |
| Engagement data | Platform certifications, QA processes |
| Webhooks | Full ownership of segmentation to analytics |
| Bulk management | Multi-touch pipeline tracking |
Supported providers
The API works with any email service that supports SMTP authentication.
Business email
Google Workspace, Microsoft 365, Zoho Mail
Transactional ESPs
SendGrid, Mailgun, Amazon SES, Postmark
Marketing platforms
Brevo (Sendinblue), Mailjet, SparkPost
Custom SMTP
Any provider with SMTP credentials
Integration options
Unlimited warm-up and real-time validation run on autopilot, so you focus on copy and sequences, without worrying about spam filters.
REST API
Direct integration for full control. Authenticate with your API key, call endpoints, and handle responses in your preferred language (Python, Node.js, PHP, Ruby, Go).
Zapier and Make
No-code automation for teams without engineering resources. Trigger warmup actions based on events in your CRM, onboarding flows, or client management tools.
Webhooks
Push notifications when something changes. Configure callbacks for reputation score updates, spam folder recoveries, or warmup completion milestones — route alerts to Slack, email, or your internal monitoring system.
White-label deployment on the go
Agencies and SaaS builders can remove EmailWarmup.com branding entirely. Your clients see your product, your dashboard styling, and your domain — the warmup infrastructure runs invisibly beneath the surface. Perfect for multiple use cases, such as:
Lead gen agencies selling deliverability as a service
Cold email platforms bundling warmup with outreach tools
Email marketing SaaS adding deliverability features without building from scratch
Hear out From our clients
See what our clients has to say about our services and experience.
43%
Higher open rates
2.8x
Open Rate
500k
Monthly Emails
Love how the personalized warmup plugs right into our email marketing software—warming up flows and campaigns so our emails land in the inbox, not promotions.
Guillermo — CEO
62%
Higher open rates
3.5x
CTR Rate
17M
Monthly Messages
We realized other tools in the market fixed different parts of our deliverability rate, which we then had to duct-tape together. We went with Maxify because everything is solved in one place. Plus, they paired us with a deliverability consultant who’s just a call away, ensuring our emails increase sales not spam.
Jordan — Sales Manager
58%
Higher open rates
2.2x
Leads Converted
3M
Monthly Emails
Honestly surprised—within the first week their consultants jumped on a call, got us off the blacklist, and boosted our Google Postmaster reputation. Way beyond what we expected.
Maral — Marketing Manager
Frequently asked questions
about Email API
Here are some commonly asked questions about our email warmup API:
Is there a free tier for API access?
What are the rate limits?
How long until warmup shows results?
Can I retrieve historical data?
Do warmup emails clutter client inboxes?
Does authentication (SPF, DKIM, DMARC) need to be set up first?
