Buy SMTP with Bitcoin or Crypto
Fast, Private, and Reliable SMTP Delivery
Get a transactional SMTP service that ensures your emails reach inboxes every time. Pay securely with Bitcoin, USDT, Monero or other cryptocurrency.
Established in 2017 | 99% Inbox Rate | No-KYC | 99.99% Uptime
Transparent Pricing – Choose Your Plan
| Monthly Volume | Price per year | Payment Options |
|---|---|---|
| Up to 5,000 emails | $49/year | Bitcoin, Crypto |
| Up to 10,000 emails | $79/year | Bitcoin, Crypto |
| Up to 20,000 emails | $159/year | Bitcoin, Crypto |
| 20,000+ emails | Custom | Bitcoin, Crypto |
All plans include full SMTP support, high deliverability, and privacy-focused service.
Why Buy SMTP from KingSMTP?
High Deliverability
Our clean IP addresses and optimized sending practices maximize inbox placement, ensuring your critical messages arrive reliably.
99% inbox rate | 10/10 Mail Tester score
Privacy & Security First
Unlike large providers, we don’t scan, sell, or analyze your emails. Your data stays private, and you can pay with crypto for complete privacy.
No-KYC | No IP Leak | Crypto payments accepted
Easy Integration
Connect KingSMTP to websites, apps, or custom platforms effortlessly. Supports WordPress, major programming languages, and popular CMS platforms.
Simple API | WordPress plugin | 2-minute setup
Dedicated Support
Fast, personal assistance for setup, troubleshooting, or scaling your SMTP service.
Email & Telegram support | Expert guidance
Features Designed for Businesses That Need Reliable SMTP
- Transactional emails: order confirmations, notifications, password resets
- Inbound & outbound routing
- Email analytics & dashboard
- Dedicated IP option
- High-volume ready
- WordPress and cPanel support
- No-KYC, privacy-focused
- Multiple crypto payment options
The Best Alternative to Mandrill, Mailgun & Mailjet
| Feature | KingSMTP | Mandrill / Mailgun / Mailjet |
|---|---|---|
| Privacy-focused | ✅ Your data stays private | ❌ May scan or analyze emails |
| Crypto Payments | ✅ Bitcoin, USDT | ❌ Rarely accepted |
| Easy Setup | ✅ Simple API, WordPress plugin | ⚠️ Can be complex |
| Dedicated Support | ✅ Fast, personal support | ⚠️ Often slow, ticket-based |
| Transparent Pricing | ✅ No hidden fees | ⚠️ Extra fees for IPs or overages |
| Inbox Deliverability | ✅ Optimized IPs, high inbox rate | ⚠️ Shared IPs can affect delivery |
Getting Started is Simple
Time needed: 2 minutes
1. Sign Up
Create your account in minutes.
2. Set Up Your Domain
Add a couple DNS records so we know you own the domain you claim to be sending emails from.
3. Integrate Your App or Website
Use our API or plugins.
4. Start Sending
Reliable emails, every time.
Trusted by Businesses Since 2017
Reviews
Overall rating: 4.5/5 stars on Capterra
| Rating Category | Score |
|---|---|
| Ease of Use | ★★★★★ |
| Customer Service | ★★★★★ |
| Features | ★★★★★ |
| Value for Money | ★★★★★ |
| Likelihood to Recommend | ★★★★★ |
Proven Email Deliverability
Mail Tester Score: 10/10
Our transactional SMTP servers are top tier with a perfect 10/10 score. You can verify this by sending test emails to Mail Tester.
KingSMTP Dashboard
View and troubleshoot your emails with ease. Our dashboard provides:
- Recent processed emails
- Detailed metadata for each email
- Spam score analysis
- Full email headers and content
- Delivery status tracking
Easy to Troubleshoot Emails
Click on any email in your dashboard to see complete details:
- Spam check results
- Spam score breakdown
- Incoming/outgoing message details
- Full SMTP transaction logs
This is pre-configured in your account—just sign up and start sending.
What is SMTP?
SMTP (Simple Mail Transfer Protocol) is the standard method used to send emails from one server to another. It acts like the digital postal system for the internet, ensuring messages are correctly routed and delivered to the right inbox.
Whether it’s a personal email, a business newsletter, or a password reset link, SMTP ensures that the message travels securely and efficiently from sender to recipient.
About KingSMTP
KingSMTP.com (formerly Kingmailer.co, founded in 2017) is a privacy-focused SMTP service provider designed to help businesses reliably send transactional emails such as:
- Order confirmations
- Password resets
- Notifications
- Shipping updates
- Account alerts
Important: KingSMTP is designed for transactional emails, not mass email campaigns or marketing newsletters.
Why Users Search for KingSMTP
- Buy SMTP with Bitcoin, USDT, or credit card
- Privacy-focused SMTP service
- Reliable transactional email delivery
- Alternative to Mandrill, Mailgun, or Mailjet
With KingSMTP, you get a trusted, high-performance SMTP service that meets your budget, payment preference, and privacy needs.
Benefits and Features
| Feature | Details |
|---|---|
| Price per year | Starting at $49 |
| Crypto Payments | Yes – Bitcoin, USDT, and other cryptocurrencies |
| Inbox rate | 99% |
| Transactional Emails Focus | Yes |
| Bulk / Mass Emailing | No |
| API included | Yes |
| MX Routing | Yes |
| DKIM & SPF Support | Yes |
| Setup Time | 2 minutes |
| Free Trial | Yes – 7 days |
| Customer Support | Email & Telegram |
| WordPress Plugin | Yes, available |
| Privacy Focused | Yes – No-KYC |
Frequently Asked Questions
Can I buy SMTP with Bitcoin, USDT, Ethereum, Doge, or other cryptocurrency?
Yes, you can buy SMTP with Bitcoin, USDT, Ethereum, Doge, or other cryptocurrencies.
Is there a recipients limit?
Paid accounts have no recipients limit.
Is this only for transactional SMTP emails?
Yes, this service is designed for transactional emails only. Free trials have this limit by default; contact us to adjust if needed.
How much does the SMTP service cost?
You can buy an SMTP yearly plan starting from $49 per year.
Can I use this SMTP service for MX routing?
Yes, you can use our SMTP service for MX routing.
Can I use this SMTP service for sending mass/bulk mail?
No, we do not offer our service for sending mass/bulk mail.
Will I have my own SMTP username and password?
Yes, after signing up and verifying your domain, your own SMTP username and password will be ready. All your emails will be logged and easily viewed in your dashboard. You’ll also have access to your own Email API.
Can I use this with a WordPress SMTP plugin?
Yes! We have our own WordPress SMTP plugin optimized for our service. It uses HTTP protocol, so even if port 25 is closed, our plugin will still work. Find “Kingmailer SMTP” in the WordPress directory.
Do I need to have a domain for this?
Yes. To use our transactional SMTP service, you need your own domain. You’ll need to verify it and add DNS records (at least SPF and DKIM) before you can start sending.
Do you offer forever free trials?
No. You can try the service for 7 days with no credit card required.
Will my emails go to the spam/junk folder?
We maintain a 99% inbox rate.
Can I send/receive emails in my email address?
Yes, this is possible. You’ll need to add our MX records to your DNS and configure routing. We’ll help you with the setup.
Can I upload my list here and start emailing?
No. We do not provide a way for customers to upload subscriber lists. We also do not allow mass mail/bulk mail newsletters.
Is it allowed to send spam?
No, we do not allow any form of spam.
Ready to Get Started?
Or contact us:
- Email: support@kingsmtp.com
- Telegram: @KingSMTPcom