Automated Email Warm-Up Service for Cold Email Deliverability
Cold email campaigns fail before they start because new email accounts and domains land in spam. Email warm-up services gradually build sending reputation by simulating real email exchanges over 2-4 weeks. An automated warm-up service that sends, opens, replies to, and moves emails out of spam using a network of real inboxes would help sales teams achieve 90%+ inbox placement before starting outreach.
Problem Statement
A B2B sales team buys a new domain and creates 5 email accounts for cold outreach. On day 1, they send 50 emails. 80% land in spam. They learn they need to 'warm up' the inboxes: gradually increase sending volume over 2-4 weeks while building positive engagement signals (opens, replies, and spam-folder removals). Doing this manually is impossible — you cannot ask 50 real people to open and reply to your warm-up emails daily. They need: connect 5 inboxes → the service auto-sends emails between real inboxes in its network → emails are opened, replied to, and removed from spam if they land there → after 2-3 weeks, inbox placement reaches 90%+.
The Idea
An automated email warm-up service that builds sending reputation by conducting real email exchanges (send, open, reply, mark-as-not-spam) across a network of inboxes, achieving 90%+ inbox placement for cold outreach domains within 2-3 weeks.
Why Now
Cold email is the #1 outbound sales channel for B2B companies but deliverability has declined: Gmail and Microsoft tightened spam filters in 2024-2025, requiring sender reputation, authentication (SPF, DKIM, DMARC), and gradual volume increases. New domains start with zero reputation and land in spam. Google now requires senders to maintain complaint rates below 0.3%. Existing warm-up services (Lemwarm, Warmbox) work but cost $15-$25/month per inbox. Sales teams with 5-10 inboxes pay $75-$250/month.
Target User
B2B sales teams and cold email practitioners who need to warm up new email domains and maintain sender reputation for cold outreach campaigns
Target Market
Email warm-up and deliverability optimization tools for B2B sales teams
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