Kingmailer is a simple and fully featured mail server / SMTP service build for sending transactional emails. Think Sendgrid and Mailgun but our focus is solely on delivery of transactional emails. Start sending, receiving or routing emails with a few clicks.

Our service is build for people who want a mail server / SMTP service to be simple and easy to use. Every month, thousands of emails are sent, received, routed using our delightful and powerful SMTP service. Try for free.
You deserve the best deal.

1). 300+ Powered websites & apps
2). 95% Recommends us
3). You can verify if your emails are delivered
4). Easy setup
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.
Kingmailer has a 98.2% email inbox placement, according to GlockApps. 1.6% Junk folder placement and 100% email delivery (0% Missing)

You can see the full report here:
Email delivery report (opens in a new tab)

Processed emails
Email meta
Organization settings

Happy customers

Our email service is trusted and used daily by over 300+ websites. Here are some:

Freelance SurinamePayByForm
Samurai SeedsDifusion Norte
ToucanIPTVHotelTalk Asia
LSD PluginsWhite Elephant Resort

Transactional emails

Transactional emails are generated by your web app, these are a few examples:

Account alerts (subscription ending, credit card expiring, etc.)
Abandoned cart notifications
Event notifications
Order confirmations and purchase receipts
Responses to customer service inquiries
Password reminders or resets
Requests for feedback
Subscription welcome emails


Kingmailer provides everything you’ll need for sending, receiving and routing (forwarding) your emails.

Transactional Emails
Bulk/Marketing allowed
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
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
Opportunistic TLS
Enforced TLS
Time to Inbox
System availability API
Service availability API

Seen something inaccurate? Let us know

Simple Plans

Sign up now. No credit card required. Upgrade or cancel anytime. We accept credit card, PayPal and Bitcoin payments.

Emails per monthPrice /month

*We’ll start you off with our free plan. 100 Test emails per month. Add-ons can be purchased once your account is approved. All plans are billed on a monthly basis. Hourly email and recipients limit can be set per your needs.


What payment methods do you accept?

We accept PayPal and all major credit and debit cards. Your payment information is stored and processed securely by 2Checkout and never reaches our servers.

Can I buy SMTP here?


Do you accept Bitcoins?


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.

Can I use this with a WordPress SMTP plugin?


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.

If you are a developer and you need this for testing purpose and don’t have your own domain, we suggest registering a free .TK domain to try our service.

How do I upgrade?

Send us an email and we’ll get your account upgraded.

Can I ask for a refund?

Yes, you can and you may.

Will my emails go to the spam/junk folder?

We give 98% guarantee that it will not.

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.

Do you accept Western Union or banking transfers?

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