Mailwarm is an email warmup service that automatically improves sender reputation for new or underperforming email domains by exchanging positive email interactions within its warmup network — building the engagement signals that inbox providers use to classify a domain as trusted.
Product Overview
Mailwarm connects to any Gmail or Outlook account via OAuth and immediately begins warmup activity: it sends emails to other accounts in its network, which automatically open, reply to, and remove those emails from spam — creating a pattern of positive engagement that gradually builds domain reputation. The service runs on autopilot without manual intervention, making it practical for teams managing multiple sending domains simultaneously. The platform's dashboard shows daily warmup activity, reputation score trajectory, and estimated inbox placement readiness. Mailwarm positions itself as a simple, reliable warmup tool without the complexity of all-in-one deliverability platforms — suitable for users who want warmup without additional features.
Key Features
- Automated Warmup: Sends and receives emails within the warmup network daily — builds positive engagement signals automatically.
- Reputation Score Tracking: Daily tracking of domain reputation score and warmup progress — shows trajectory toward inbox-ready status.
- Multi-Account Management: Manage multiple sending accounts simultaneously — useful for agencies and teams with multiple sending domains.
- Gmail & Outlook Support: OAuth connection to Google Workspace and Microsoft 365 — no SMTP configuration required.
- Inbox Placement Monitoring: Tracks inbox vs. spam placement during warmup period to verify improvement.
Best For
Sales teams and agencies warming up multiple sending domains who want a simple, automated warmup service without additional deliverability tool complexity.
Pricing
From $79/month per inbox. Volume discounts for multiple inboxes.
Key Integrations
Gmail, Google Workspace, Outlook, Microsoft 365, Lemlist, Instantly, Smartlead, Woodpecker, Reply.io, Mailshake
Pros
- Fully automated — no manual activity required during warmup
- Multi-account management suits agencies managing multiple client domains
- Simple OAuth setup — operational in minutes without SMTP configuration
- Dashboard provides clear progress visibility during warmup period
Cons
- Warmup-only tool — no content analysis, blacklist monitoring, or sending platform features
- Higher price per inbox than some competitors
- Warmup effectiveness varies by domain age, history, and inbox provider
