Warmy.io

Warmy.io tackles the cold email deliverability problem head-on: it automates email warm-up by sending and replying to messages from a network of real inboxes, gradually building sender reputation without manual effort.

What it does

Warmy.io connects your email account to its network of real, active inboxes. It then sends and replies to emails in a natural pattern, mimicking human behavior to train spam filters that your address is legitimate. The tool monitors deliverability metrics and adjusts warm-up intensity based on your account's age and reputation.

Best for

• Sales teams and agencies sending cold outreach at scale
• Founders launching new email accounts for prospecting
• Anyone who needs to improve deliverability after a spam complaint or blacklist

Strengths

• Uses real inboxes, not bots, to warm up accounts
• Customizable warm-up volume and schedule per account
• Integrates with major email providers (Gmail, Outlook, custom SMTP)

• Automated Warm-Up — Sends and replies to emails from a real inbox network to build sender reputation.
• Deliverability Monitoring — Tracks inbox placement rate and spam score in real time.
• Custom Schedules — Set daily warm-up volume and timing to match your sending patterns.
• Multi-Account Support — Manage warm-up for multiple email addresses from one dashboard.
• Spam Complaint Prevention — Automatically pauses warm-up if complaints spike.
• API Access — Integrate warm-up into your own email automation workflows.