Email
Monitor Resend with MrCron
MrCron mirrors Resend delivery rate, bounce rate, and domain DNS health every 5 minutes so you catch inbox problems before they silently break signups and password resets.
How MrCron monitors Resend
- Delivery rate and bounce rate for the last 24 hours per project.
- Domain DNS status (SPF, DKIM) with amber warning when records are missing or broken.
- Sent, delivered, and bounced counts on the project overview.
- Auth-failure detection with an amber Rotate key CTA when the API key stops working.
- Alert rules that fire on bounce-rate spikes via any notification channel.
What you will see
Delivery rate, bounce rate, domain DNS health on your project page.
Auth flow: API Key. Credentials are stored encrypted at rest with AES-256-GCM and never returned to your browser.
Start monitoring Resend
Sign in, create a project, and connect Resend in under a minute. First check ships in the free tier.
Frequently asked questions
- What Resend credentials does MrCron need?
- A Resend API key with read access. MrCron stores it encrypted at rest and only decrypts it inside the sync worker.
- Does MrCron check DMARC?
- SPF and DKIM checks are shipped today. DMARC verification is on the roadmap; a follow-up sync pass will fetch per-domain DNS status.
- How is delivery rate calculated?
- MrCron pulls the Resend account-level counters for delivered, bounced, and complained, then computes delivered / (delivered + bounced + complained) for the last 24 hours.
- Can I alert on a specific domain going unverified?
- Yes. Create an alert rule on the resend_domain_status metric and route it to any notification channel.