Email Warmup

Email Warmup by Warmup Inbox is a deliverability optimization tool designed to help cold email senders reach the primary inbox instead of spam or promotions folders. It works by connecting your email account to a large, controlled network of real inboxes that automatically send, receive, open, and positively engage with your messages. These interactions gradually build a positive sender reputation and signal to email providers that your domain and IP are trustworthy.

Key capabilities include automated warmup sequences, gradual volume ramp-up, and realistic engagement patterns such as replies, star/flag actions, and removal from spam. The platform supports multiple email providers and domains, allowing agencies, sales teams, and founders to warm up several accounts in parallel. Users can monitor performance through detailed analytics, including spam rate trends, reputation health, and inbox placement indicators.