You can add a custom prefix to your mabl mailbox email addresses. While mabl supports creating multiple distinct email addresses in a single journey, tagging them with a custom prefix can help you easily mark and differentiate them. (e.g. querying for results containing the chosen string in your own databases).

Here are the steps to follow:

1. Create a variable - choose mabl mailbox address

2. Create another variable - choose string template of the form prefix+{{@email_address}}. You can use the following separators after your prefix:

• - dash
• _ underscore
• + plus sign

3. Use your new variable as you would normally for a mabl mailbox address, and have your Application Under Test send email to that address.

4. The email will be available in the Mail section of the trainer.