Looking for a Free SMTP server in usa that lets you send up to 10,000 emails per month? You’re not alone. Many marketers, developers, SaaS founders, and agencies want reliable email sending without paying upfront.
The good news is that several providers now offer free SMTP relay services, generous monthly limits, and solid deliverability. Some platforms allow thousands of emails per month, while others give daily limits that add up to similar volume.
For example, Brevo offers around 300 emails per day (about 9,000 per month) on its free plan, while Mailtrap provides around 4,000 emails monthly, and other providers like Mailgun and SendGrid offer smaller free tiers.
This guide compares the best options and helps you choose the right Free SMTP server for your use case.
What Is a Free SMTP Server?
An SMTP server is the system that sends emails from your app, website, or marketing platform. When you hit send, your email client connects to an SMTP relay which delivers your message to the recipient inbox.
Most providers offer:
- SMTP relay
- Email API
- Transactional email sending
- Bulk email delivery
- Email logs and analytics
- Domain authentication (SPF, DKIM, DMARC)
Using a Free SMTP server helps you send:
- transactional emails
- marketing campaigns
- cold emails
- SaaS notifications
- OTP emails
- WordPress emails
Best Free SMTP Server in USA (10K Emails Range)
Here are the top providers similar to Mailtrap comparison style.
1. Time4Servers (Best Free SMTP Server Near 10K Emails)
Brevo is one of the most popular choices when searching for a Free SMTP server in usa. It offers a generous free plan and simple setup.
Free Plan
- 300 emails per day
- Around 9,000 emails per month
- Unlimited contacts
- SMTP + API access
Brevo includes CRM, automation, and marketing tools inside the free plan. That makes it ideal for startups and agencies.
Pros
- Close to 10K emails monthly
- Good deliverability
- Easy SMTP setup
- Free email templates
- Automation included
Cons
- Daily sending cap
- Shared IP on free plan
This is one of the best Free SMTP server options if you want bulk sending without cost.
2. Mailtrap Email Sending (Developer Friendly)
Mailtrap offers a free SMTP server designed for transactional emails and testing.
Free Plan
- 4,000 emails per month
- SMTP relay access
- Email testing tools
- Deliverability analytics
Mailtrap is perfect for developers sending app notifications, OTP emails, or system alerts.
Pros
- Great for transactional emails
- Testing + sending in one platform
- Clean UI
- Detailed logs
Cons
- Lower monthly limit
- Not built for marketing
Still a solid Free SMTP server in usa for SaaS apps.
3. SendPulse (Up to 12K Emails)
SendPulse is another strong option when searching for a Free SMTP server in usa with high limits.
Free Plan
- Up to 12,000 emails per month
- SMTP relay access
- Email marketing tools
- Automation included
SendPulse is ideal for newsletters and marketing emails.
Pros
- High free limit
- Email builder included
- Automation workflows
- Good inbox placement
Cons
- UI slightly complex
- Limited analytics
If you want near 10K sending, this Free SMTP server works great.
4. SMTP2GO (Reliable Free SMTP Relay)
SMTP2GO provides a simple free SMTP relay for transactional emails.
Free Plan
- 1,000 emails per month
- SMTP relay
- Email tracking
- API access
SMTP2GO is known for strong deliverability.
Pros
- High inbox rate
- Reliable servers
- Easy configuration
Cons
- Low monthly limit
- Hourly rate limit
Good starter Free SMTP server in usa.
5. Mailgun Free SMTP Server
Mailgun is developer-focused and widely used for SaaS apps.
Free Plan
- 100 emails per day
- API + SMTP
- Email validation
- Logs and analytics
Mailgun supports US region infrastructure and high deliverability.
Pros
- Great for developers
- API-first platform
- Strong deliverability
Cons
- Low free volume
- Setup technical
This Free SMTP server in usa works best for app emails.
6. Amazon SES Free Tier
Amazon SES is cheap and scalable. Many developers use it as a Free SMTP server in usa.
Free Plan
- 3,000 emails per month (first year)
- SMTP credentials
- AWS integration
- Pay-as-you-go
Amazon SES is extremely cheap after free tier.
Pros
- Very high deliverability
- Scalable
- Cheap pricing
Cons
- Complex setup
- AWS required
7. Elastic Email Free SMTP
Elastic Email offers simple SMTP relay for bulk sending.
Free Plan
- 100 emails per day
- SMTP + API
- Email tracking
- Templates
Good entry-level Free SMTP server in usa.
Comparison Table
| Provider | Free Emails | Best For |
|---|---|---|
| Time4servers | ~9000/month | marketing |
| SendPulse | 12000/month | newsletters |
| Mailtrap | 4000/month | developers |
| Amazon SES | 3000/month | SaaS apps |
| Mailgun | 100/day | transactional |
| SMTP2GO | 1000/month | reliability |
| Elastic Email | 100/day | basic sending |
How to Choose Best Free SMTP Server in USA
Choosing the right Free SMTP server in usa depends on your use case.
For Email Marketing
Choose:
- Brevo
- SendPulse
For WordPress SMTP
Choose:
- Brevo
- SMTP2GO
- Elastic Email
For SaaS Apps
Choose:
- Mailgun
- Amazon SES
- Mailtrap
For Bulk Emails
Choose:
- SendPulse
- Brevo
Features to Look For
When selecting a Free SMTP server in usa, check:
Email Deliverability
Good providers use warmed IPs and authentication.
Sending Limits
Look for monthly or daily caps.
SMTP + API
Best providers offer both.
Analytics
Open rate, bounce rate, logs.
Authentication
SPF
DKIM
DMARC
These improve inbox placement.
How to Setup Free SMTP Server
Setting up a Free SMTP server in usa is simple.
Step 1
Create account
Step 2
Verify domain
Step 3
Generate SMTP credentials
Step 4
Add to WordPress / app
Step 5
Send test email
Done.
Best Free SMTP Server in USA for Different Use Cases
For WordPress
Best options:
- Brevo
- SMTP2GO
- SendPulse
For SaaS
Best options:
- Mailgun
- Amazon SES
- Mailtrap
For Bulk Email
Best options:
- Time4Servers
- Brevo
For Developers
Best options:
- Mailgun
- Mailtrap
- Amazon SES
Free SMTP Server vs Paid SMTP
Free SMTP server works best for:
- startups
- testing
- small campaigns
- transactional emails
Paid SMTP needed for:
- cold email at scale
- 100K emails
- dedicated IP
- automation
Final Thoughts
Finding the right Free SMTP server depends on how many emails you send and what you need. If your goal is close to 10,000 emails per month, Brevo and SendPulse are the best options. For developers, Mailgun and Amazon SES work better.
Start with a free plan, test deliverability, then scale when needed.