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Plan a safe email warmup schedule. Enter your current volume, target, and mailbox count to get a day-by-day sending plan that protects your sender reputation.
Enter your current daily sending volume (use 0 for brand-new mailboxes).
Set your target daily volume — the number of emails you want to send once warmup is complete.
Enter how many mailboxes (sending accounts) you will use to distribute volume.
Pick a warmup speed — Conservative (15%/day), Moderate (20%/day), Aggressive (30%/day), or set a custom percentage.
Click "Generate Warmup Schedule" to see your day-by-day plan with safety indicators, a chart, and downloadable CSV.
Email warmup is the process of gradually increasing your sending volume on a new or cold email account. Mailbox providers like Gmail and Outlook track sender reputation — if you suddenly send hundreds of emails from a fresh account, you will trigger spam filters. A gradual ramp-up signals legitimate behavior and builds trust with inbox providers.