Start sending, receiving, routing/forwarding your emails, using our free SMTP server. After signing up you will have your free SMTP Username and SMTP Password. And also free SMTP Web API.
| Emails /mo | Price /mo | Price /year |
|---|---|---|
| 5,000 | N/A | USD49 |
| 10,000 | N/A | USD79 |
| 20,000 | N/A | USD159 |
| 50,000 | USD49 | USD489 |
| 100,000 | USD99 | USD990 |
Always know exactly what happened to your emails
Nothing is more frustrating than an email that just disappears. A customer says they never got your message. Your developer says it was sent. Nobody knows the truth.
With Kingmailer, every email is logged and searchable for 30 full days. Click on any message and see exactly what happened — delivered, opened, bounced, or blocked. In seconds. No guessing, no back and forth.
Here is what it looks like inside your dashboard:
Ready from day one, no setup needed.
Kingmailer provides everything you’ll need for sending, receiving and routing (forwarding) your emails.
Transactional Emails ✔
Bulk/Marketing allowed ✘
SMTP ✔
REST API ✔
Official libraries ✔
Community libraries ✘
Spam score checking ✔
Spam complaint handling ✔
Bounce handling ✔
Shared IPs ✔
Dedicated IPs ✔
Separate servers ✔
Pre-made email templates ✘
Template engine ✘
Inbox preview ✔
Scheduled delivery ✘
A/B testing ✘
Email address validation ✘
Inbound email processing ✔
RegEx matching on all email headers (“routes”) ✘
Chain multiple filters ✘
UTF-8 encoding ✔
Raw MIME ✔
Strip signature and quote blocks ✔
Spam filtering ✔
Delivery rates ✔
Bounce rates ✔
Open rates ✔
Click tracking ✔
Unsubscribe tracking ✘
Spam rates ✔
Full message storage ✔ (180 days /custom)
Automatic tagging ✘
Custom tagging ✔
Custom header metadata tag ✘
Custom tracking domain ✘
Geolocation data ✘
Email client and device tracking ✔
Real-time notifications ✔
SPF ✔
DKIM ✔
DMARC ✔
2FA ✘
Opportunistic TLS ✔
Enforced TLS ✔
Time to Inbox ✔
System availability API ✔
Service availability API ✔
How does it work?
After signing up with Kingmailer you will have your own free SMTP mail server, with username and password. You can use the SMTP server and integrate with your web apps for example WordPress.
Why you will love KingSMTP
| Kingmailer SMTP WordPress plugin |
| Quick email integration |
| Easy setup |
| Free plan |
| Highly reliable |
| Web API |
| Can also be used for inbound emails |
| Easy to use UI |
| Email + Telegram support |
| Easy to view logs of sent emails |
| Easy to configure in Gmail |
| Bitcoin also accepted |
Have questions?
We accept Bitcoin, Ethereum, Dogecoin, PayPal and all major credit and debit cards. Your payment information is stored and processed securely by 2Checkout and never reaches our servers.
Yes.
No, we do not offer our service for sending mass / bulk mail.
Yes.
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.
Yes. We also have our own WordPress plugin, just search Kingmailer SMTP in the WordPress directory. It works with our HTTP API.
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.
No. You can try the service for 14 days. No credit card required.
Yes, no problem.
We have a 99% inbox rate.
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.
No. We do not provide a way for customers to upload their subscribers onto our platform.
No, we do not allow any form of spam.