Free email warm-up that gets new mailboxes out of spam
Stage
Startup
Not given
Founded
Not given
Not given
Based in
US
US
Pricing model
Freemium
Freemium
Pricing
Free checker with no signup. Paid plans: Starter $29/month (up to 3 domains), Growth $59/month (up to 15 domains), Agency $149/month (up to 60 domains). Early-bird prices locked in for as long as subscribed.
Warm-up: Free for up to 20 mailboxes, then $5 per mailbox per month ($3 each from 10 extra, $2 each from 50 extra). Extra mailboxes can be earned free through referrals (up to +50). Outbound cold email: $2 per 1,000 emails from prepaid credits ($10, $25, or $100 packs, never expire). Hosted mailbox:
Key features
Daily domain re-checking at 8am Mountain time
Dashboard showing health scores and trends
Email alerts on DNS changes and blocklist listings
Monday email report with domain status updates
Plain-English explanations of DNS issues and fixes
No mailbox access or API keys required
Automatic warm-up emails with human-paced sending during business hours
Real two-way threads with automatic replies to about 40% of warm-up emails
Automatic spam rescue by moving warm-up emails out of spam and into inbox
Daily health score per mailbox with spam rate and delivery metrics
Daily DNS checks for SPF, DKIM, and DMARC records
Shared warm-up network or private pool per account
Cold email sequences with CSV upload and up to 4 steps
Unified inbox for all connected mailboxes with warm-up mail hidden
REST API with 30 endpoints and remote MCP server with 28 tools
Free DNS and blacklist checking tools
What makes it different
Catches domain setup failures silently: alerts you when DNS records drift, records are edited, or domains are blocklisted—issues that don't throw errors in your sending tool.
Free forever: the domain checker stays free with no signup required; you only pay for paid monitoring.
Early-bird pricing locked in: prices never increase as long as you stay subscribed.
Works with any sending tool: monitors domains used with Instantly, Smartlead, Outreach, Salesloft, Apollo, Lemlist and others.
Spam rate measured in real receiving mailboxes, not estimated
Only warm-up emails are touched; real mail is never read, moved, or answered
Pay-as-you-go cold email at $2 per 1,000 emails with no monthly fee
Credits never expire and are only used when emails actually send
OutboxWatch
BobWork Email Warm-up