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Email Warmup Calculator

Calculate the optimal email warmup schedule to build sender reputation and reach your daily sending goal without triggering spam filters.

Sign up for 25 free searches per month no credit card required.

// how it works

How to Use Email Warmup Calculator

  1. 01

    Set Target Volume

    Enter your daily email sending goal and your current sending volume to define the warmup range.

  2. 02

    Get Your Schedule

    The calculator generates a day-by-day ramp-up plan with gradual volume increases and progress tracking.

  3. 03

    Follow the Plan

    Send emails according to the schedule to build sender reputation and avoid triggering spam filters.

// features

Why Use Email Warmup Calculator

  • Custom Target Volume

    Set any daily sending goal from 10 to 10,000 emails and get a tailored warmup schedule for your needs.

  • Day-by-Day Plan

    Provides a detailed daily schedule showing exact send volumes, increases, and percentage progress toward your goal.

  • Smart Ramp Rate

    Uses a progressive ramp-up algorithm that starts slow, accelerates in the middle, and tapers near the goal.

  • Best Practices Built In

    The schedule follows email deliverability best practices recommended by major email service providers.

  • Visual Progress Tracking

    Each day shows a progress bar and percentage so you can see exactly how close you are to your sending goal.

  • Privacy First

    All calculations run locally in your browser. No sending data or schedules are stored on any server.

// use cases

Who Uses Email Warmup Calculator

  • Sales Teams

    Warm up new email accounts before launching cold outreach campaigns to maximize inbox placement rates.

  • Cold Email Senders

    Gradually increase daily send volume on fresh domains to build a positive sender reputation from scratch.

  • Agencies

    Create warmup plans for multiple client domains and email accounts to ensure consistent deliverability.

  • New Domain Owners

    Establish sending reputation for a newly purchased domain before running any email marketing campaigns.

// faq

Frequently asked questions

Still have questions? Visit the help center

// quick start

Make your first call in a minute

Free account, real API key, the same endpoints Enterprise customers use.

  1. 1Create a free account25 searches a month. No card.
  2. 2Copy your key and secretFrom API keys in the dashboard.
  3. 3Call the APIPaste the request; the answer is JSON.
Get free API keyRead the docs
curl "https://api.tomba.io/v1/email-finder?domain=piedpiper.com&first_name=Richard&last_name=Hendricks" \
  -H "X-Tomba-Key: $TOMBA_API_KEY" \
  -H "X-Tomba-Secret: $TOMBA_SECRET_KEY"
Response
200 OK· 1 search credit
{
  "data": {
    "email": "richard@piedpiper.com",
    "first_name": "Richard",
    "last_name": "Hendricks",
    "full_name": "Richard Hendricks",
    "website_url": "piedpiper.com",
    "company": "Pied Piper",
    "pattern": "{first}",
    "department": "executive",
    "type": "personal",
    "position": "CEO",
    "country": "US",
    "gender": "male",
    "twitter": null,
    "linkedin": "https://www.linkedin.com/in/richard-hendricks",
    "score": 100,
    "accept_all": false,
    "phone_number": true,
    "verification": {
      "date": "2025-01-15T10:32:00+01:00",
      "status": "valid"
    },
    "sources": [
      {
        "uri": "https://piedpiper.com/blog/engineering",
        "website_url": "piedpiper.com",
        "extracted_on": "2024-06-01T09:14:07+01:00",
        "last_seen_on": "2025-01-10T17:02:44+01:00",
        "still_on_page": true
      }
    ],
    "phone_data": []
  }
}