Email
Monitor Postmark with MrCron
MrCron mirrors Postmark sent, bounced, and spam-complaint counts every 5 minutes so you can see transactional email health next to signups, checkouts, and other business events.
How MrCron monitors Postmark
- Sent and bounced counts for the last 24 hours per server.
- Bounce rate calculated over the last 24 hours.
- Spam-complaint count for the last 24 hours.
- Auth-failure detection with an amber Rotate key CTA when the server token stops working.
- Alert rules that fire on bounce-rate spikes via any notification channel.
What you will see
Sent, bounced, bounce rate, spam complaints (24h) on your project card.
Auth flow: API Key. Credentials are stored encrypted at rest with AES-256-GCM and never returned to your browser.
Start monitoring Postmark
Sign in, create a project, and connect Postmark in under a minute. First check ships in the free tier.
Frequently asked questions
- What Postmark credentials does MrCron need?
- A Postmark server API token with read access. MrCron stores it encrypted at rest and only decrypts it inside the sync worker.
- Does MrCron support multiple Postmark servers?
- Yes. Attach one Postmark integration per project; each carries its own server token.
- How is bounce rate calculated?
- MrCron pulls the Postmark bounces endpoint counts for the last 24 hours and divides by total sent, matching what you see in the Postmark UI.
- Can I alert on a rising spam-complaint count?
- Yes. Create an alert rule on the postmark_spam_complaints_24h metric with a threshold above your baseline and route it to any channel.