# Postmark: Open Webhook Delays

> Postmark status incident “Open Webhook Delays” on 2026-08-18: impact minor (vendor’s label), 32 h, 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/postmark/incidents/507337
Last updated: 2026-08-19T22:12:35Z

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2026-08-18 14:34 UTC · Resolved: 2026-08-19 22:12 UTC · Duration: 32 h
- Updates: 1
- [Vendor status page: https://status.postmarkapp.com/notices/vizw7qiqdyeyg8qc-open-webhook-delays](https://status.postmarkapp.com/notices/vizw7qiqdyeyg8qc-open-webhook-delays)
- [Company: Postmark](https://rewindex.com/company/postmark.md)

## Timeline of updates

- **resolved** 2026-08-19 22:12 UTC: The issue is now fully resolved. We are continuing to improve our systems, observability, and monitoring to prevent future occurrences. Thank you for your patience. Starting August 18th at ~9:34am CT (~14:34 UTC), Postmark experienced delays in delivering open webhook events. New open events resumed delivery on August 19th at ~8:47am CT (~13:47 UTC), and all backlogged events completed re-delivery at ~4:52pm CT (~21:52 UTC).

## Cite this

Status incident (vendor impact label: minor) posted by Postmark, started 2026-08-18 14:34 UTC, resolved after 32 h, 1 update(s).

- Canonical URL: https://rewindex.com/company/postmark/incidents/507337
- Citation: Postmark, “Open Webhook Delays” (2026-08-18 14:34 UTC). Archived by Rewindex: https://rewindex.com/company/postmark/incidents/507337 (CC BY 4.0).
- Markdown link: `[Postmark: Open Webhook Delays (2026-08-18)](https://rewindex.com/company/postmark/incidents/507337)`


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Canonical: https://rewindex.com/company/postmark/incidents/507337 · Markdown: https://rewindex.com/company/postmark/incidents/507337.md · JSON: https://rewindex.com/api/v1/companies/postmark/incidents/507337 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T21:44:05.960Z