Buy SMTP with Bitcoin

We accept Bitcoin. Buy SMTP Mail Server with Bitcoin. SMTP username and password with Bitcoin.

$5 p/mo 50,000 emails

Check our SMTP Mail Server presentation

Free SMTP Username

After signing up you will have your own SMTP username/password to get started.

Try for free. No credit card required. We accept USD, EURO and Bitcoin.

Questions? WhatsApp: +597-878-8413 Email:

Your SMTP Server Dashboard

10/10 SMTP Score

We have a 10/10 Mail Tester score (click to zoom in, opens in a new tab):



Optimize the deliverability of your emails

Manage multiple domains

Monitor your emails reputation

Personalized SPF, DKIM and DMARC authentication


Track & Analyze Performance

History of all your messages with your contacts

Monitor email performance in real time

Get detailed statistics on opens, clicks, bounces, etc.


Have a question? Our support team is available 24/7/365.

Our email is:

SMTP Server demo

Grow your business

Growing your business is not easy. You have undoubtedly found dozens of tools on the internet, with many functionalities.

Our goal is not to offer you a platform with features that you do not need or will use, but a platform that helps you grow your business. We are working to resolve your growth and marketing needs.

We would like you to spend as little time as possible on email marketing, leaving you more time for other activities within your business.


SMTP Features & Details

Real-time results
Get up-to-the-minute analytics on your message deliverability and engagement metrics.

Email statistics
Monitor all your email logs and statistics on deliverability, open rates, click rates and more.

Webhooks & Integrations
Manage your email statistics using webhooks and integrate Kingmailer SMTP with all your tools: WordPress, PrestaShop, WooCommerce and more.

Flexible SMTP APIs
Create customized, dynamic messages using a powerful API.

Optimal deliverability
Ensure your welcome messages, order confirmations, shipping notifications, app alerts, and other important emails reach the inbox.

Message Archiving & Logs
Archive and search historical transactional emails.


Why do you need this?

You need this to know what's happening with your emails. Similar to Google Analytics which you use, to analyse website traffic, you need this tool to analyse 'email traffic'. If you're not analyzing any email traffic, you're missing out. So whether it's a newsletter email, a transactional email such as a WooCommerce order email/new sign up, or an email relay to your Gmail inbox, it's important that you log this data so you can always troubleshoot/analyse this data. Every website need this, similar to Google Analytics. Try for free and see for yourself.

Will I have my own SMTP username and password?

Yes, after signing up, verifying your domain, your own SMTP username and password will be ready for you to use. All of your emails will be logged and easily viewed in your own email dashboard.

How do I use this with a WordPress SMTP plugin?

Go to your SMTP Mail Settings page and enter:

From email: < enter here your company email)

From name: < Your company name >

SMTP Host:

Encryption: none (emails are already being encrypted by our servers)

Port: 25

Auto TLS: on

Authentication: on

SMTP username / SMTP password

Visit the Help section in your Kingmailer account to find your SMTP username and password.

How are payments handled?

All of our billing is handled by 2Checkout.

What payment types do you accept?

We accept payments via Bitcoin, Visa, Paypal, MasterCard, American Express, Diners, and JCB.

Do you accept Bitcoins?

Yes, we do.

Do I need to have a domain?

Yes. In order to be able to use our SMTP services, you will need to have your own domain. You will need to verify the domain and add a few DNS records, before it's good to go.

How do I upgrade?

To upgrade or downgrade your plan, please send us an email

Can I cancel my subscription?

You can cancel your subscription anytime, just send us an email

Can I upload my list here and start emailing?

No. We do not provide a way for customers to upload their subscribers onto our platform. We only provide the SMTP credentials and email relay services, that you can use with your own email marketing software or free email marketing plugin in your WordPress website.

Will my email go to spam/junk folder?

Most definitely not. BUT, if you are you sending unsolicited emails, the chances are high it will.

I bought a mailing list, can I send emails to it?

Actually no, as it will hurt our SMTP servers.

Can I connect this with Gmail, Yahoo, Hotmail etc?

Yes, this is possible. Just use the SMTP settings, and all emails will be relayed via our servers and sent to your email inbox. Make sure to configure the mx records first.

Can I request refund?

Yes, no problem, send us an email

Do you accept Western Union or banking transfers?

Kingmailer can accept these payment methods in certain situations. Please contact for assistance.