Your first 10 customers won't come from Spam.
Cold outreach is often the only scalable channel a bootstrapped founder can run alone. SimplyWarmup ensures every email you send from your company domain lands in the Primary Inbox — from day one, automatically.
Your inbox in 30 days
Pacing from 2 to 40 emails/day automatically
What happens to founders who skip warmup.
These outcomes are common. They happen silently and are often misdiagnosed as bad copy or poor targeting.
Launch day email blast
You launch, import a list of 200 prospects, and send a cold intro from your brand new domain. Google sees a zero-history domain attempting a bulk send and routes every email straight to Spam. You interpret the silence as product-market fit failure.
Burned domain, new domain
After months of poor open rates you realize the domain is the issue and buy a new one. You restart the same process. The new domain burns just as fast. This cycle continues until you run out of runway.
Copying "spray and pray" tactics
You connect to a cheap warmup tool because it's free. It swaps repetitive emails with a pool of burned SMTP domains. Google's ML detects the static pattern in days. You're worse off than before you started.
Up and running in under 5 minutes.
No technical knowledge required. If you have a Google Workspace or Microsoft 365 inbox, you're ready.
Sign up with your work email
Create an account at SimplyWarmup.com. You only need to provide your company email — no credit card required to start.
Connect your sending inbox via OAuth
Click "Connect Inbox" and authorise SimplyWarmup via your Google or Microsoft account. This is a standard OAuth flow — no SMTP credentials, no passwords. Authorization takes under 30 seconds.
Warmup starts automatically
That's it. SimplyWarmup begins generating warmup emails from your inbox within the next scheduled cycle. Pacing ramps from 2/day at a rate you can monitor from your dashboard. No further action required.
Start your cold outreach after 2 weeks
Give the warmup cycle 2 weeks to build a strong sending history. By then you'll have a health score above 90, a pacing stage of ~7 emails/day, and a domain that ESPs trust. Now your cold emails land where they should.
Billed monthly. Cancel any time.
FAQ
Questions founders ask before signing up
When should I start warming up my domain?
Day zero — the moment your DNS records (SPF, DKIM, DMARC) are configured. Every day without warmup is wasted reputation-building time. Google Workspace domains require a minimum of 15 days of warmup before cold sends produce reliable inbox placement. Starting immediately means you're campaign-ready when you need to be, rather than waiting two weeks after the moment you decide to launch outreach.
Can I send cold emails while warmup is still running?
Yes. Inboxes that maintain blended warmup alongside cold sends retain 8% higher inbox placement over 90 days versus inboxes that stop warmup when outreach begins. Cold email typically generates 1–5% reply rates; warmup generates 30–35%. SimplyWarmup keeps warmup running at maintenance level continuously, so your engagement average stays in the range spam filters reward.
How long until I can safely send cold outreach?
For Google Workspace inboxes: 15 days minimum, 20–25 days recommended. For Microsoft 365 Premium: 3–5 days minimum, 10–14 days recommended. SimplyWarmup ramps you automatically from 2 emails per day. You can start cold outreach when your dashboard shows a health score of 90+ and pacing stage 7 or above.
Is $19/month worth it for a single inbox?
The relevant comparison is not the monthly cost — it's the cost of burning your sending domain. Recovery from a "Bad" reputation in Google Postmaster Tools takes 4–8 weeks, during which your cold emails reliably land in spam. For a founder using cold email as their primary acquisition channel, that's months of lost pipeline. At $19/month, warmup is the cheapest insurance policy in your go-to-market stack.