Mailwarm

Mailwarm automates the tedious process of warming up email accounts so your cold outreach lands in inboxes, not spam folders. It sends and replies to realistic emails from a network of real mailboxes, gradually building sender reputation.

What it does

Mailwarm connects to your email account (Gmail, Outlook, or custom SMTP) and simulates natural email activity—sending, replying, and marking as important—from a pool of real inboxes. Over 2-4 weeks, it improves your domain and IP reputation, reducing spam rates.

Best for

• Sales teams running cold email campaigns
• Marketers sending newsletters from new domains
• Freelancers and agencies using multiple email accounts

Strengths

• Works with Gmail, Outlook, and custom SMTP servers
• Real inbox network (not bots) for natural engagement
• Detailed analytics on deliverability and reputation score

• Automatic warm-up — Sends and replies to emails daily from real inboxes
• Multi-account support — Warm up unlimited email accounts simultaneously
• Custom scheduling — Set daily send limits and timing to mimic human behavior
• Reputation dashboard — Track sender score, spam rate, and inbox placement
• Integration with cold email tools — Works with Mailshake, Lemlist, and others
• Spam test — Check if your emails land in inbox or spam before campaigns