Excel files sent using send files by email feature
Update - We are in the process of testing a solution.

Currently, recipients may not be able to open Excel and CSV files sent by email.

This issue only affects files sent from the Notify website.

It does not affect files sent using the Notify API.

The issue only affects Excel and CSV files. Other files will still open correctly.

We will contact all affected users once the issue is resolved.

We will post our next update by midday tomorrow, Wednesday 21 October 2026.
Oct 20, 2026 - 16:44 BST
Identified - We have identified the problem and are working on a fix.

Recipients may not be able to open Excel and CSV files sent by email.

This issue only affects files sent from the Notify website.

It does not affect files sent using the Notify API.

The issue only affects Excel and CSV files. Other files will still open correctly.

We will contact all affected users once the issue is resolved.

We will post our next update by 5:30pm today.
Oct 20, 2026 - 11:47 BST
Investigating - We are investigating an issue with the Notify send files by email feature.

Excel files attached as a secure download link in an email using the “send files by email” feature may not open when the recipient downloads the file.

Other file types are unaffected.

Excel files sent via the Notify API are not affected.

We will provide a further update by 12:00 on 20 October 2026.

Thank you for your patience


GOV.UK Notify
Oct 19, 2026 - 21:33 BST

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API Operational
Notify website Operational
Email sending Operational
Email delivery receipts Operational
Text message sending Operational
Text message delivery receipts Operational
Text message receiving Operational
Letter sending Operational
Send files by email Partial Outage
Download files sent by email Operational
Callbacks Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance

Oct 20, 2026

Unresolved incident: Excel files sent using send files by email feature.

Oct 19, 2026

Oct 18, 2026

No incidents reported.

Oct 17, 2026

No incidents reported.

Oct 16, 2026

No incidents reported.

Oct 15, 2026

No incidents reported.

Oct 14, 2026

No incidents reported.

Oct 13, 2026

No incidents reported.

Oct 12, 2026

No incidents reported.

Oct 11, 2026

No incidents reported.

Oct 10, 2026

No incidents reported.

Oct 9, 2026

No incidents reported.

Oct 8, 2026

No incidents reported.

Oct 7, 2026

No incidents reported.

Oct 6, 2026

REST API Partial Outage
Resolved - This incident has been resolved.
Oct 6, 16:00 BST
Monitoring - A fix has been implemented and we are monitoring the results.
Oct 6, 15:29 BST
Update - We are continuing to investigate this issue.
Oct 6, 14:29 BST
Investigating - Starting on the evening of the October 5 2026:

A bug with a third party dependency has caused a partial outage for those using the notify REST API directly (not using one of our API clients).

Users who use the API directly may be getting a high rate of errors back from the API and may find they are unable to send or check the status of notifications they have sent.

We believe we have identified the dependency that has caused the issue and are aiming to have a fix deployed within ~ the next hour. We will update by 4pm at the latest.
Oct 6, 14:24 BST
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