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WARMUP PLANNING / SKY FREE TOOLS

Warmup Seed Calculator

Estimate provider coverage, seed-mailbox capacity and test-send workload.

Your entries stay in this tab. Not sent to or saved by Sky. Export or print before closing or reloading, or your entries will be lost. Do not include passwords, API keys, recipient lists or private logs.

Seed tests are a sample. Seed interactions do not replace genuine permissioned audience engagement, and no seed count guarantees inbox placement.

LOCAL PLANNING ESTIMATE

Warmup seed calculator

Estimate test copies and reusable seed-mailbox inventory from your own workload and provider assumptions.

Runs in this browser
  1. 1
    ConfigureWorkload and inventory
  2. 2
    ReviewCopies and mailbox gaps
  3. 3
    ExportCSV or print a copy
1. Your test workload

Count test runs and seed copies—not subscribers or campaign volume.

2. Your seed inventory

Mailboxes you control or are authorized to use. No addresses needed.

Provider 1
Enter assumptions and calculate when ready. No sending starts here.
NEXT / REVIEW YOUR PLAN

Plan how many controlled test copies and available mailboxes your monitoring design requires.

Source: Google sender guidelines
Your inbox placement tests · Account required