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Mailkick can serve uploaded images from a custom image subdomain (e.g. image.yourdomain.com). This improves branding and can help with deliverability since your email assets use your domain.

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Prerequisites

  • You must be a workspace admin (Settings sections are admin-only).
  • You can edit DNS records for your domain.
  • Pick a dedicated subdomain (recommended): image.yourdomain.com

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Step 1 — Set the image domain in Mailkick

  1. Open Settings → Image Domain
  2. Enter your hostname (example: image.yourdomain.com)
  3. Click Get target (or Update domain)
Mailkick will return a CNAME target to point your subdomain to.

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Step 2 — Add the CNAME record

In your DNS provider, create a CNAME record:
  • Name/Host: your subdomain (e.g. image)
  • Value/Target: proxy.mailkick.app
DNS propagation can take a few minutes. If you use Cloudflare as your DNS provider, make sure the record is set to DNS only (grey cloud), not Proxied.

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Step 3 — Verify status

Back in Settings → Image Domain, click Refresh status until it becomes active. Mailkick checks a health endpoint automatically:
  • https://<your-hostname>/_mailkick/health
If “Service health” is not OK, wait for DNS propagation and confirm your CNAME is correct.

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What changes once it’s active?

  • New and existing image URLs are served from:
    • https://<your-hostname>/image/<path>
  • Preview/export will use your hostname when generating email HTML.