33mail now supports multiple usernames in a single account. You can add additional usernames that forward to your existing account email address or specify a new forwarding address per username. Premium users get 1 additional username included, Pro users get 5, Enterprise users get 25. Your additional usernames will count towards your account alias limits but work the same way as standard usernames otherwise.
You can add additional usernames on the dashboard settings page in the ‘Additional Usernames’ section. Please try out the feature and let us know what you think.