Mailflow (Auto Warmer), backed by QuickMail, is a free email warmup tool for Google Workspace and Outlook accounts that builds sender reputation through a warmup network. The warmup itself remains free, and it is also bundled with QuickMail's sending plans.
Pros & cons
✅ Pros
- Free warmup tool
- Backed by QuickMail
- Works with Gmail and Outlook
⚠️ Cons
- Fewer advanced controls than paid tools
- Signup flow can require a card
Who it's best for
Operators wanting free, no-frills warmup for Google or Outlook inboxes.
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