Buy SMTP Transactional Email Service

Kingmailer SMTP offers transactional SMTP service, that let’s you send, receive and route/ forward emails.

Clean IP address Inbound email routing Email dashboard

Email API 99.99% Uptime 30 Days log retention

View your recent processed emails
Meta data

Simple, email-based pricing

Sign up for a 14-day trial. We accept Bitcoin, Ethereum, Bitcoin Cash, Dogecoin and USD.

$11.95 /month0%
$143.40 $79 /year45%
20,000 emails per month. Unlimited recipients. For Routing & Transactional emails only. Not for sending mass mail or newsletters. Have questions? Send us an email We accept Bitcoin, Ethereum, Dogecoin, PayPal and all major cards.
Thank you for supporting small business.

How does Kingmailer compare?

$14.95 /mo$6.58 /mo$35 /mo
Pricing based on annual payments. Compared with Sendgrid’s Essential Email API plan and Mailgun’s Foundation plan.

Buy now

Select a payment option below to purchase a plan.

To pay us using Bitcoin (BTC), you can click directly on one of the check out links below.

Not for sending mass / bulk mail / newsletters.

$11.95 /monthBuy now
$143.40 $79 /yearBuy now

The payment is handled by Opennode.

To pay us using Ethereum (ETH), you can deposit the payment directly into our wallet address, and we will update your account.

This is our ETH-wallet address:


To pay us using Dogecoin (DOGE), you can deposit the payment directly into our wallet address, and we will update your account.

This is our DOGE-wallet address:


We accept all major cards and also PayPal.

To pay us using one of these methods, please get in touch:

Easy to troubleshoot emails

In your Kingmailer dashboard, you can click on each email to troubleshoot. Kingmailer logs and retains data of your emails, this is very useful when you need to troubleshoot your emails.

Here are a few screenshots to give you an idea:

Incoming messages
Spam check
Spam status
Extra details of your message
Spam Check details
Spam score

This is already pre-configured in your account, give it a try.

Fast setup, easy integration

Time needed: 2 minutes.

Get up and running today. Here’s what needs to get done:

  1. Activate your account

    After you sign up, check your email, click a link, and you’re done.

  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. Start sending

    You can now send, receive or route emails, using the SMTP credentials or HTTP API.

Customers who are already using Kingmailer


Can I buy SMTP here?

Yes, you can buy SMTP here.

Can I buy SMTP with Bitcoin?

Yes, you can buy SMTP with Bitcoin.

Can I buy SMTP with credit card or PayPal?

Yes, you can buy SMTP with credit card or PayPal.

Can I buy SMTP with Ethereum, Doge or other cryptocurrencies?

Yes, you can buy SMTP with Ethereum, Doge or other cryptocurrencies.

Is there a recipients limit?

Paid accounts have no recipients limit.

Is this only for Transactional SMTP emails?

Yes, only for transactional SMTP emails.

How much does SMTP cost?

You can buy SMTP monthly or yearly plan. Per month $11.95 or per year $79 (you get 45% discount).

Can I use this SMTP Service for MX routing?

Yes, you can use our SMTP service for MX routing.

Can I buy Transactional SMTP here?


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, 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. You will also have your own Email API.

Can I use this with a WordPress SMTP plugin?

Yes. We also have our own WordPress plugin, just search Kingmailer SMTP in the WordPress directory. It works with our HTTP API.

Do I need to have a domain for this?

Yes. In order to be able to use our SMTP service, you will need to have your own domain. You will need to verify the domain and add a few DNS records (at least SPF and DKIM), before it’s good to go.

Do you offer forever free trials?

No. You can try the service for 14 days. No credit card required.

Will my emails go to the spam/junk folder?

We have a 99% inbox rate.

Can I send/receive emails in my email address?

Yes, this is possible. You will need to add our MX records to your DNS and configure routing. Don’t worry, we’ll help you with this.

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. Also, we 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 start?

Start your free trial today.