Cheap SMTP Server. Forever Free. Upgrade or cancel anytime. We also accept Bitcoin.

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

We accept USD / EURO / BITCOIN

  • $0 p/mo
  • 20 Emails p/hour limit
  • Max 100 contacts
  • 14,400 Free emails p/mo
  • $5 p/mo
  • No hourly email limit
  • Max 2,500 contacts
  • 50,000 emails p/mo
  • $10 p/mo
  • No hourly email limit
  • Max 5,000 contacts
  • 100,000 emails p/mo

Check our small presentation

View all your email traffic with one click. We don't just give you an SMTP server. We're also giving you the tools to improve your business. Email analytics is a MUST. Click to zoom in:

Email dashboard


Best designed for Transactional emails, SMTP email relays and sending newsletters.

All plans include

  • SMTP Username / Password
  • Data Recovery
  • Email Archive (180 days)
  • Email Monitoring
  • Queue Manager
  • Response Management
  • Routing
  • Signature Management
  • Spam Blocker
  • Spam Check
  • Whitelisting / Blacklisting


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.