Works with:
Claude Code
Cursor
Codex
Cline
Windsurf
Organizations active
Global regions (US / CA / EU)
Automatic spam rescue
Pipeline generated by the team behind SendTech
Google & Microsoft 365 supported · Connect in 2 minutes · Cancel anytime
You find out too late.
Reply rates drop, and weeks later you learn you’ve been in spam the whole time.
One bad week burns a domain.
Aggressive ramps and shared warmup pools damage reputation that took months to build.
Your stack is five tabs.
Warmup lives in one tool, blacklist checks in another, and DNS in a spreadsheet nobody owns.
01 · Connect or buy
~2 min. Connect Gmail or Microsoft 365 through OAuth, or buy domains and mailboxes in SendTech.
Quick setup · 3 domains
sendtowin.io
getsendtowin.co
sendtowin.co
02 · Create a warmup pool
~3 min. Accounts build trust by emailing each other inside their pool. Set it up in a few clicks, with the API, or with one prompt.
Warmup pool · US
jacob@sendtowin.io
Google Workspace
Warming
sam@getsendtowin.co
Microsoft 365
Warming
8 more accounts in this pool
03 · Send from anywhere
Ongoing. Every 30 minutes, accounts send, reply, and get rescued from spam. Then launch campaigns from anywhere.
jacob@sendtowin.io
Week 1 · warming
5/day
sam@getsendtowin.co
Week 2 · warming
15/day
martin@sendtowin.co
Week 4 · accelerating
35/day
katya@sendtowin.io
Week 5 · ready
50/day
Ramp timeline
Weeks 1–2: 5-15/day. Weeks 3–4: 25-35/day. Week 5+: 50+/day. Launch campaigns after week 2.
60
50
40
30
20
10
Day 1 Day 4 Day 7 Day 10 Day 13 Day 16 Day 19 Day 22 Day 25 Day 28 Day 31 Day 34
Emails / day
W1–2
W3–4
W5+
Launch
Automated Warmup Engine
A phase-based ramp takes accounts from 5 to 50+ emails a day. AI personas and spintax make every email unique, and emails go out only during business hours in your timezone.
Automatic Spam Rescue
Every 2 hours, SendTech scans every account for warmup emails that landed in spam, moves them to the inbox, and marks them “not spam.” There’s nothing to configure.
Warmup Pools
Isolated pools keep one problem account from affecting the others. One account can belong to several pools.
Domains & Mailboxes
Buy domains and mailboxes and set them up without leaving SendTech, or provision them from code.
DNS & Blacklist Monitoring
SPF, DKIM, and DMARC are validated for every domain, with setup guides for Gmail, M365, SendGrid, Mailgun, and SES. Real-time blacklist checks cover Spamhaus, Barracuda, SORBS, and more.
Bounce Management
SendTech detects and classifies hard, soft, and block bounces, and builds your suppression list automatically. Accounts pause before the damage spreads.
Spam rescue
Rescue cycle · 2:00 PM
12 rescued
Just now
Rescue cycle · 12:00 PM
9 rescued
2 hours ago
Docs that match the API, with examples that run
Warmup, pools, mailbox provisioning, and inbox health, all available as endpoints
Health data you can pipe into your own alerts, dashboards, or CI
Available through the API
Warmup, pools & provisioning
Inbox health data
MCP server · coming soon
In-house
Several vendors
Scripts, tools, and servers you maintain.
What you take on:
Custom inbox scripts per provider
Scheduling logic you maintain
A network of accounts you manage
3+ separate tools
Parsing and list logic
Your own infrastructure
Weeks of development
Several vendors
SendTech
Built in
Warmup, monitoring, and sending in one plan.
What you get:
Spam rescue every 2 hours
Business-hours sending + phase ramp
Isolated warmup pools
DNS + blacklist monitoring
Bounce detection + auto-suppression
Multi-region workers (US / CA / EU)
REST API · MCP server coming soon
One bill
Cancel anytime.
One vendor answers for the inbox.
One bill instead of five tools.
Warmup, monitoring, and sending are in one plan.
It works alongside your team.
SendTech plugs into your existing stack instead of replacing it.
Built by operators.
It comes from the team behind $2.6B+ in B2B pipeline.
In good company.
Made by the team behind outbound for ElevenLabs, ZoomInfo, JLL, and many others
Built for teams who can’t afford downtime.
OAuth 2.0 only
We never ask for your password. Tokens are encrypted at rest.
Full audit log
Every action is logged with a timestamp, including team changes, settings, and pauses. You can export the log for compliance reviews.
GDPR compliant
You can export or delete all your data at any time.
Multi-region network
Dedicated workers in the US (San Francisco and New York), Canada (Toronto), and the EU (London, Paris, and Berlin). Your warmup traffic comes from the same regions as real business email, with automatic failover.
99%+ uptime
Worker heartbeats are monitored in real time. If a worker goes down, you get alerted, not your clients.
Role-based access
Owner, Admin, and Viewer roles give you full control over who sees and changes what.