The Numbers
The biggest & fastest deliverability network
FirstSales has over 50,000+ real email accounts in its deliverability pool and that number is constantly growing. Bigger pool = better sending reputation.
50,000+
Active Email Accounts
In our warmup network
2M+
Warmup Emails Daily
Building reputation
99.7%
Uptime Guarantee
Always warming
87%
Average Inbox Rate
After 21-day warmup
0
Spam Complaints
From our network
24/7
Automated Monitoring
Real-time adjustments
Industry average inbox placement:
60-70%
→ FirstSales:
87%
How It Works
Save time with 1-click activation
Once you've connected your email accounts to FirstSales, activating warmup is literally one click. Enable it and never worry about spam again.
Connect Your Email Accounts
Add unlimited Gmail, Outlook, or other email accounts in seconds. We support all major providers.
One-click connection
OAuth security
Unlimited accounts
Enable Warmup with One Click
Flip the switch and our network starts interacting with your emails automatically. No manual work needed.
Instant activation
AI-powered conversations
Human-like behavior
Watch Your Reputation Grow
Monitor your deliverability score in real-time. See your inbox placement rate climb day by day.
Real-time dashboard
Daily reports
Inbox insights
Smart Warmup
Naturally warm your accounts with our Slow Ramp
Our slow ramp gradually increases warmup emails naturally. Day 1 send 2 emails, Day 2 send 4 emails, Day 3 send 6 emails and so on. Much more organic.
Weekly Warmup Schedule
Gradual Increase
Day 1
2
emails
Starting
Day 2
4
emails
Ramping
Day 3
6
emails
Ramping
Day 4
8
emails
Ramping
Day 5
10
emails
Building
Day 6
12
emails
Building
Day 7
15
emails
Building
Starting
Building
Optimal
Protect Your Domain
Gradual volume increase prevents spam filters from flagging your account as suspicious.
Organic Growth Pattern
Mimics natural human behavior that email providers expect from legitimate senders.
21-Day Optimal Timeline
Research-backed duration to establish maximum sender reputation and trust.
Private Network
Private network of headless browsers
FirstSales's deliverability system uses a private network of headless browsers to guarantee a safe & effective deliverability boost for your sending accounts.
Headless Browser Network
Our deliverability system uses a private network of headless browsers to guarantee safe & effective warmup.
100% Private & Secure
All warmup emails are contained within our private network. Your data never leaves our ecosystem.
Global IP Distribution
Warmup traffic comes from diverse IPs across different regions, mimicking real-world email patterns.
Scalable Infrastructure
Our network grows automatically to accommodate all users without compromising quality.
Human-Like Interactions
Emails are opened, scrolled, and replied to just like a real person would behave.
Verified Accounts Only
Every account in our network is verified and monitored to ensure maximum deliverability.
Advanced Options
Take the next step with advanced settings
Fine-tune your warmup strategy with advanced controls. Default settings work great, but power users can customize every aspect.
Read Emulation
ON
Our system spends time and scrolls through your warmup emails to emulate human-like reading behavior.
More natural engagement patterns
Random Volume
ON
Send a random number of warmup emails each day to avoid predictable patterns.
Undetectable by spam filters
Custom Open Rate
Choose the exact open rate you want for your warmup emails.
Control your metrics
Reply Rate Control
Set your desired response rate for warmup conversations.
Build sender credibility
Spam Protection
Adjust spam protection levels to match your domain's reputation.
Protect your domain health
Custom Schedule
Define exactly when warmup emails are sent throughout the day.
Match your timezone
Warmup Settings
Active
Read Emulation
Enabled
Target Open Rate
67%
Target Reply Rate
23%
Daily Volume Range
15-25 emails
Testimonials
See why thousands love FirstSales warmup
2,500+
Companies trust FirstSales
4.9/5
Average rating
97%
Would recommend
"First sales is a wonderful service we purchased for our companies growth and the tools are preparing use to take things to the next level. It's an ALL IN ONE insane solution!!"
RJ
Raoul J.
Small-Business (50 or fewer emp.)
"The outreach and prospector feature is a complete package any salesperson would need. It helps me prospect and reach from a single location."
DS
Dishant S.
Partner, Small-Business
"Firstsales.io offer a comprehensive solution for cold emailing and outreach, with a user-friendly interface and enterprise-level capabilities. If you are looking for a tool to help with your sales outreach efforts, it may be worth considering Firstsales.io as an option."
AS
Aditya S.
Small-Business (50 or fewer emp.)
"I really appreciate that they have made the onboarding process much simpler than other cold emailing platforms I have used. The platform walks the user through the entire process."
MO
Michael O.
Developer, Small-Business
"One of the best email outreach tools I have ever seen in my 9 years of business experience. The best thing I like about the software is split testing and outreach through cold emails. Everything runs so cool and flawless. I recommend everyone to go for it if you want to generate more sales and revenue predictably."
SJ
Santhosh H J
Business Owner
"It can automate email follow-ups for warm leads. The AB testing feature is pretty amazing, better than lots of other tools. It makes the cold outreach easier."
TC
Tim C.
Founder, Small-Business
FAQ
Frequently Asked Questions
Learn how Firstsales protects your domain, lands emails in inboxes, and turns cold outreach into revenue—everything in one place.
Email warmup is the process of gradually increasing your email account's outgoing volume while making sure your emails are frequently opened and replied to. This builds your sender reputation and increases your chances of hitting your future prospect's inbox. FirstSales's warmup system is completely automated and requires just one click to get started.
Warmup is important because it significantly increases the rate at which you land in your prospect's inbox as opposed to the spam or promotions folder. This means that your emails will get opened more, which means you will get more replies, more meetings and most importantly, more deals.
Warmup should always be enabled. Even if you're not actively using your sending accounts - leave warmup on. Your sender reputation will only increase with time, so disabling warmup only makes sense if you plan on discontinuing using these email accounts. If you are starting with a brand new domain and email accounts, it is recommended to warm them up for a minimum of 2 weeks (preferably 4) before starting any kind of cold outreach.
We recommend starting with our default limits set inside FirstSales. Once you start sending more and more volume, you can start experimenting with higher limits, but we recommend being cautious with going crazy with limits unless you want to burn your domains and accounts fast.
Warmup emails all have unique ID in their subject lines so they are easily distinguishable from regular emails. All warmup emails are AI generated and replicate human conversations. You'll never confuse warmup emails with your actual outreach campaigns.
We have over 50,000+ real email accounts in our warmup pool and that number is growing every day. Our private network of headless browsers ensures all interactions are safe, secure, and completely isolated from your real email communications.
Yes, absolutely. Our warmup system uses a private network where all interactions are contained. Warmup emails never go to real prospects, and all activity is designed to mimic genuine human behavior. The slow ramp feature ensures gradual volume increase that looks natural to email providers.
Yes! You can connect unlimited email accounts to FirstSales and warm them all simultaneously. Each account is managed independently with its own warmup schedule and deliverability tracking.
