mailkube

Send transactional email through a developer-focused API and SMTP relay

Meet mailkube

mailkube provides transactional email infrastructure for applications that need to send account messages, notifications, and other product email. Developers can use its REST API, official language SDKs, or an SMTP relay that fits an existing mail integration. Templates, message tags, scheduling, and webhooks cover common tasks around sending and tracking delivery.

The dashboard exposes delivery activity and analytics so a team can investigate failures and follow how messages perform. A command-line interface supports sending and webhook development from the terminal. Customer data is hosted in the European Union, and the service offers a free plan for getting started before moving to higher sending volumes.

Discussion

Tried it? Share a useful thought or ask a question.

Product details

Website: mailkube.com
Status: Launched
Category: Developer tools
Listed: Nov 5, 2026

Explore related topics

API Email delivery SDK Transactional email Webhooks

Embed upvote button

Let visitors support mailkube from your website.

Button appearanceLightDark

mailkube

Upvote

Paste into your site’s HTML

<div data-betaneon-widget="light" style="box-sizing:border-box;display:flex;align-items:center;gap:12px;width:320px;max-width:100%;min-height:84px;padding:12px 14px;margin:0;border:1px solid #e1e0dc;border-radius:12px;background:#ffffff;color:#181818;font:400 14px/1.4 Arial,Helvetica,sans-serif;text-align:left;">
  <img src="https://m.betaneon.com/ic/a6a4ef38-0cd3-483d-ba3c-c58593543513.webp" alt="" width="36" height="36" referrerpolicy="no-referrer" style="box-sizing:border-box;display:block;flex:0 0 36px;width:36px;height:36px;margin:0;padding:0;border:0;border-radius:9px;object-fit:contain;background:#fff;">
  <div style="box-sizing:border-box;flex:1;min-width:0;margin:0;padding:0;">
    <span title="mailkube" style="display:block;margin:0;padding:0;color:#181818;font:700 16px/1.4 Arial,Helvetica,sans-serif;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;">mailkube</span>
    <div style="display:flex;align-items:baseline;gap:4px;margin:4px 0 0;padding:0;white-space:nowrap;">
      <span style="margin:0;padding:0;transform:translateY(-1.5px);color:#626664;font:400 14px/1.2 Arial,Helvetica,sans-serif;">on</span>
      <a href="https://betaneon.com/" target="_blank" rel="noopener noreferrer" aria-label="BetaNeon home (opens a new tab)" style="display:inline-flex;flex-shrink:0;margin:0;padding:0;border:0;background:transparent;text-decoration:none;outline-offset:3px;"><img src="https://betaneon.com/res/brand/wordmark.svg?v=453516e27973dc87" alt="BetaNeon" width="87" height="16" referrerpolicy="no-referrer" style="display:block;width:87px;height:auto;margin:0;padding:0;border:0;"></a>
    </div>
  </div>
  <a href="https://betaneon.com/vote/mailkube" target="_blank" rel="noopener noreferrer" aria-label="Upvote mailkube on BetaNeon (opens a new tab)" style="box-sizing:border-box;display:flex;flex:0 0 68px;flex-direction:column;align-items:center;justify-content:center;gap:3px;min-height:56px;margin:0;padding:0 0 0 12px;border:0;border-left:1px solid #e1e0dc;background:transparent;color:#087f5b;font:400 14px/1.2 Arial,Helvetica,sans-serif;text-decoration:none;text-align:center;outline-offset:3px;">
    <span aria-hidden="true" style="box-sizing:border-box;display:block;width:9px;height:9px;margin:3px 0 0;padding:0;border:0;border-top:2px solid #087f5b;border-left:2px solid #087f5b;transform:rotate(45deg);"></span>
    <img src="https://betaneon.com/embed/upvote/mailkube/count.svg?theme=light" alt="Votes" width="56" height="20" referrerpolicy="no-referrer" style="display:block;width:56px;height:20px;margin:0;padding:0;border:0;">
    <span style="color:#087f5b;font:400 14px/1.2 Arial,Helvetica,sans-serif;">Upvote</span>
  </a>
</div>

Links open in a new tab. Visitors sign in on BetaNeon, then confirm their upvote. The vote count updates when the page loads.

Unclaimed

Building mailkube?

Claim this profile to keep your product’s story up to date.

Sign in with your verified work email. Matching website domains are approved automatically; other requests are reviewed by our team.

Meet mailkube

Discussion

Product details

Explore related topics

Similar products

OpenMail

Helo

MachineMail

Sublay

Mnexium

Resend