---
title: Subaddressing support in Email Routing
description: Subaddressing, also known as plus addressing, is now supported in Email Routing.
image: https://edgetunnel-b2h.pages.dev/changelog-preview.png
---

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## Subaddressing support in Email Routing

Jul 21, 2025 

[ Email Service ](https://edgetunnel-b2h.pages.dev/email-service/) 

Subaddressing, as defined in [RFC 5233 ↗](https://www.rfc-editor.org/rfc/rfc5233), also known as plus addressing, is now supported in Email Routing. This enables using the "+" separator to augment your custom addresses with arbitrary detail information.

Now you can send an email to `user+detail@example.com` and it will be captured by the `user@example.com` custom address. The `+detail` part is ignored by Email Routing, but it can be captured next in the processing chain in the logs, an [Email Worker](https://edgetunnel-b2h.pages.dev/email-service/api/route-emails/email-handler/) or an [Agent application ↗](https://github.com/cloudflare/agents/tree/main/examples/email-agent).

Customers can use this feature to dynamically add context to their emails, such as tracking the source of an email or categorizing emails without needing to create multiple custom addresses.

![Subaddressing](https://edgetunnel-b2h.pages.dev/_astro/subaddressing.x65bljxx_Z2W6LN.webp) 

Check our [Developer Docs](https://edgetunnel-b2h.pages.dev/email-service/configuration/email-routing-addresses/#subaddressing) to learn how to enable subaddressing in Email Routing.

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