Warmy
By Warmy.io
Warmy is an email deliverability and warm-up service that automates the process of building sender reputation for email accounts used in cold outreach and marketing campaigns.
Definition
Warmy is an email deliverability and warm-up service that automates the process of building sender reputation for email accounts used in cold outreach and marketing campaigns.
Overview
Warmy focuses on a single, specific problem: new or infrequently used email accounts have little sender reputation, so mail providers are more likely to route their messages to spam. Warmy automates "warm-up" by having connected mailboxes exchange realistic emails with a network of other addresses — opening, replying, and marking messages as not-spam — gradually signaling to providers that the account is trustworthy. It also offers deliverability monitoring, such as checking domain and DNS configuration (SPF, DKIM, DMARC) and inbox-placement testing. Because it addresses only warm-up and deliverability rather than campaign sending itself, Warmy is typically used alongside outreach platforms like Instantly.ai, Lemlist, or Smartlead, which have their own built-in warm-up but are sometimes paired with a dedicated deliverability tool for extra assurance.
Key Features
- Automated mailbox warm-up through simulated inbox activity
- Domain and DNS health checks (SPF, DKIM, DMARC)
- Spam-placement and inbox-placement testing
- Sender reputation monitoring over time
- Support for warming multiple connected mailboxes