Mailchimp is performing scheduled database optimization maintenance on Saturday, February 28, 2026. The Mailchimp API will be temporarily unavailable in four separate rounds, with each interruption lasting approximately 10 minutes.
Maintenance schedule
| Round | Time (EST) | Expected Duration |
|---|---|---|
| Round 1 | 11:00 AM – 11:30 AM | ~10 minutes |
| Round 2 | 12:30 PM – 1:00 PM | ~10 minutes |
| Round 3 | 2:00 PM – 2:30 PM | ~10 minutes |
| Round 4 | 3:30 PM – 4:00 PM | ~10 minutes |
Who is affected?
This maintenance will impact users of the Mailchimp for WooCommerce extension as well as any custom integrations that use the Mailchimp API to sync WooCommerce data. If you’ve built an extension that syncs customer information, orders, or triggers automated workflows through Mailchimp’s API, your integration will experience brief interruptions during this window.
Expected impact
During each 10-minute interruption, integrations will encounter API connection failures including 503 Service Unavailable responses and timeout errors. Customer subscription requests may fail temporarily, order data sync will be delayed, and abandoned cart emails may not trigger during the interruption. Users may see connection error messages in their WordPress admin dashboard.
Additional resources
Check Mailchimp’s status page at status.mailchimp.com for real-time updates during the maintenance window. The official Mailchimp for WooCommerce extension is available on the WooCommerce Marketplace.
If you’re still seeing issues after the scheduled maintenance windows, please reach out to Mailchimp Support.
Note: This is a third-party service maintenance event. WooCommerce and WordPress core are not affected. Only integrations communicating with Mailchimp’s API will experience temporary interruptions.
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