Best Free SMTP Server

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.

PriceDiscount
$11.95 /month0%Buy now
$143.40 $79 /year45%Buy now
20,000 emails per month. Unlimited recipients. For Routing & Transactional emails only. Not for sending mass mail or newsletters. Have questions? Email us info@kingmailer.co. We accept Bitcoin, Ethereum, Dogecoin, PayPal and all major cards. Check our Pricing page for more details.

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.

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 Kingmailer

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 + WhatsApp support
Easy to view logs of sent emails
Easy to configure in Gmail
Bitcoin also accepted

Have questions?

What payment methods do you accept?

We accept Bitcoin, Ethereum, Bitcoin Cash, Dogecoin, 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 Transactional SMTP here?

Yes.

Can I use this SMTP service for sending mass / bulk mail?

No, we do not offer our service for sending mass / bulk mail.

Do you accept Bitcoin, Ethereum, Bitcoin Cash or Dogecoin?

Yes.

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.

Can I ask for a refund?

Yes, no problem.

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.

Is it allowed to send spam?

No, we do not allow any form of spam.

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