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Since the launch of the Email Expiration Date initiative, we've been working to promote the Expires header as a practical solution to reduce the environmental footprint of our email inboxes. Today, we're reaching a major milestone: the Thunderbird extension that...

Standardization projects always take time. That’s normal: in the email ecosystem, every evolution must be carefully designed, debated, and validated collectively. But here’s the good news: the Expires: header is progressing toward standardization. This milestone will...

Among the email service providers that have implemented the Expiration Date feature, six solutions have taken the step. We aim to interview the product managers of these solutions to understand how the implementation went. This interview aims to reassure product teams...

Here is the report of the second surveillance committee meeting for the project, which took place on May 5, 2025. Please feel free to contact us if you have any questions or if you wish to support the project. Attendance Present: Alexandra Di Giusto (Cofidis) Marion...

Good news for email routing platforms and Email Service Providers (ESPs): the first version of the implementation guide for email expiration dates is now available online. This guide lays out the technical and functional foundations for enabling ESPs to integrate this...

Recently, we published a feature proposal for Open Source email clients. Following the publication of this document, 16 open-source email clients have been proposed to implement email expiration dates! We have proposed implementing the email expiration date feature in...