Outage in Substack
Issue with reported open rates
Minor
March 27, 2026 - Started 27 days ago
Official incident page
Official incident page
Incident Report
We’re investigating an issue affecting reported open rates for some publishers. Current evidence suggests this is related to how Gmail loads tracking pixels, and does not indicate a change in engagement or deliverability.
We take responsibility for ensuring these metrics are accurate and are prioritizing improvements to our open rate tracking so this is resolved as quickly as possible. We will continue to provide updates here as we learn more.
Components affected
Substack Email deliveryTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
INVESTIGATING
27 days ago - at 03/27/2026 10:20PM
We’re investigating an issue affecting reported open rates for some publishers. Current evidence suggests this is related to how Gmail loads tracking pixels, and does not indicate a change in engagement or deliverability.
We take responsibility for ensuring these metrics are accurate and are prioritizing improvements to our open rate tracking so this is resolved as quickly as possible. We will continue to provide updates here as we learn more.
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