Plus-Sign Aliasing and Catch-All Addresses

Tag test emails with plus-sign aliases, capture every address on a domain with a catch-all account, and track each account's storage quota.

Plus-Sign Aliasing

Any email sent to user+anything@yourdomain.com delivers to user@yourdomain.com. This works automatically, no configuration needed.

Examples

john@example.com               # The actual account
john+shopping@example.com      # Delivers to john@example.com
john+github@example.com        # Delivers to john@example.com
john+test-run-42@example.com   # Delivers to john@example.com

The part after + is ignored for delivery but preserved in the To header, so you can filter or search by it.

Catch-All Addresses

A catch-all account captures every email sent to your domain that doesn't match an existing account.

Setup

Go to the Accounts page

Create a new account with `*` as the username

Select your domain and set a password

Any email to an address that doesn't have its own account will land here

How It Works

Say your domain is example.com and you have one regular account (support@example.com) plus a catch-all (*@example.com):

support@example.com -> delivered to the support account (exact match wins)
sales@example.com -> delivered to the catch-all
anything-at-all@example.com -> delivered to the catch-all

Storage Quota

Each account has a storage quota. The accounts list shows how much space is used. If an account fills up, incoming messages will be rejected until you delete old messages.

Email Testing API

REST API for domains, accounts, mailboxes, messages, and tokens. Authenticate with an X-API-KEY header; stream new messages over SSE via Mercure.

Mailbox

Every account starts with Inbox, Sent, Drafts, Trash, and Junk. Create custom mailboxes to sort messages by test run, environment, or client.