Emily Lane
August 07, 2024
Implemented a feature to handle ThrottleException errors more effectively using SES's sendRawEmail function. Previously, a 400 status with ThrottleException would not trigger retries, potentially disrupting email delivery processes. With the new update, such errors now throw a retryable provider error to ensure more robust and resilient email sending. Comprehensive testing and documentation were included to ensure this feature works seamlessly across all supported screen sizes and under various load conditions.
Learn more: Learn how Courier handles delivery retries · See the full list of response and error codes

Redesigned Settings Page
Settings is redesigned, with workspace and developer pages in separate sections and nine background colors.
By Emily Lane
August 18, 2026

Redesigned Preferences Editor and hosted preference center
Build, preview, and launch a branded notification preference center with no frontend code.
By Emily Lane
July 18, 2026

Experiments: A/B Testing in Journeys
Run 2 to 10 message variants on a single send node in a journey, split live traffic by weight, compare per-variant results, and promote the one you want.
By Emily Lane
July 09, 2026
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