rewindex

CompaniesPostmarkIncidents

Postmark: SMS codes for two-factor authentication may not arrive

MinorStatus: resolvededitedStarted Resolved (1.7 h)2 updatesstatus.postmarkapp.com (opens in new tab)

Timeline of updates

  1. investigating

    You may not receive the SMS code when you log in to your Postmark account. If this is happening, you might see “Unknown Error Occurred” or “There was a problem sending the security code to your phone number.”  The issue is with our SMS delivery provider. Sending email through Postmark isn’t affected. We’re investigating and will update this page as soon as we know more.

    What you can do now:

  2. resolved

    Resolved

    We've identified and resolved the issue affecting SMS two-factor authentication codes. Codes should now arrive as expected when you log in to your Postmark account. Sending email through Postmark wasn't affected.

    If you still don't receive a code, please contact support: https://postmarkapp.com/support (opens in new tab)

    Resolved at 14:50 EDT (18:50 UTC) - 27 October 2026.

Changes Rewindex caught on this incident

Archive proof

Rewindex commits each version of an incident it captures to a daily checkpoint, chains it to the day before, and has the checkpoint timestamped by FreeTSA and DigiCert. That proves these records existed by then and have not been changed since, by anyone, Rewindex included.

How the archive is checked, and what it cannot prove.

Impact, status and times are the vendor’s own, as last archived. View on status.postmarkapp.com (opens in new tab).

Cite this

Status incident (vendor impact label: minor) posted by Postmark, started 2026-10-27 17:19 UTC, resolved after 1.7 h, 2 update(s); edited after publishing.

Title
SMS codes for two-factor authentication may not arrive
Vendor
Postmark
Date
URL
https://rewindex.com/company/postmark/incidents/512682

Postmark profileRecent Postmark incidentsAll outages on October 27, 2026Postmark in October 2026MarkdownJSON