IP Spam Listing - Email Sending Issues

Resolved
Resolved

Between approximately June 30, 2025 at 4:47pm EST to July 1, 2025 at 8:21am EST, an IP was listed for spam causing some customers emails to not be sent. This IP has been stopped from sending while we remedy the issue. Emails sent after this time period should be unaffected.

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Postmark Support
Began at:

Affected components
  • API
    • Sending
  • SMTP
    • Sending