Transactional Email API 3-Year Plan

Transactional Email API 3-Year Plan

$180.00 $45.00 Save 75% / 36 months

  • 40,000 Emails per month
  • SMTP username/password
  • Web API
  • Lightning fast email delivery
  • 60 days of full content history and stats
  • Detailed open, click, and link tracking
  • Simple monthly pricing with no add-ons
  • A knowledgeable and responsive support team
  • Clear documentation and migration guides


Email delivery server (SMTP server)

Complete and fully featured mail server for use by websites & web servers. Similar to Amazon SES, Sendgrid or Mandrill.

  • APIs, SMTP relay, and webhooks
  • API keys and permissions
  • DKIM customization
  • Data rich email activity feed

What is this all about?
Kingmailer’s email delivery api is build to serve your mail processing requirements. It includes everything you need to start sending and receiving emails in your own web apps.

Send email from your sites and servers
Kingmailer provides an HTTP API for easy integration with web applications, and an SMTP server for integration with existing applications and systems.

Easy to set up with comprehensive docs
It’s quick and easy to get started with Kingmailer. Add your domain, after signing up, create your credentials and you can start sending emails. Need to improve inbox delivery? Add the DNS records, which are provided also.

Spam and virus checking
Kingmailer integrates with SpamAssassin and Amavis for effective filtering of unsafe and unwanted content.

Message Retention
Whether you want to debug your app, or check exactly what was send, Kingmailer allows you to store and examine all send and received messages.

IP pools
For higher volume sending, and shared email systems, manage pools of IP addresses for sending outbound email.

Additional information

Emails per month


Email history


Shared IP


Data Recovery


Email Archiving


Email Monitoring


Queue Manager


Response Management




Shared Inboxes


Signature Management


Spam Blocker


Whitelisting / Blacklisting


Only for transactional

Kingmailer’s email api is only for transactional emails.

Not for marketing
Promotional emails

Only for transactional
Welcome emails
Reset password emails
Weekly digests
Receipts and invoices


Kingmailer is a cloud-based SMTP provider that acts as an email delivery engine, allowing you to send email without the cost and complexity of maintaining your own email servers. Kingmailer manages the technical details of email delivery, like infrastructure scaling, ISP outreach, reputation monitoring, and real-time analytics.

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Kingmailer is designed to help you send marketing email. It allows you to upload and manage recipient lists, build or upload your own HTML email templates, and then schedule and send your email campaigns through Kingmailer. This option works well for bulk, newsletter-type sends.

Category: Email Marketing

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Every time you make a request to send one message to one recipient, it is counted by Kingmailer as a message sent, regardless of the message being deferred or sent to spam.

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When you’re ready to sign up, select the plan that suits your needs based on your monthly email volume. We accept credit cards and charge on the first of every month. There are no contracts—each plan is month-to-month—and you can cancel at any time. If you want to do some testing before signing up for a paid plan, you can integrate with Kingmailer and send up to 240 emails per day, every day, with your free account.

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You can send up to 7,200 emails per month, 20 emails per hour, forever free. While this not be much, it is still a perfect way to test our platform. If you wish to remove this limit, you can upgrade.

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