Servicemail is a service mail ingestion and delivery service. It's designed to
deal with those annoying noreply email addresses that would otherwise clutter
your inbox, and instead route them to a messaging service of your choice.
The goal of Servicemail is to allow you to create accounts with services under random email addresses with no correlation to one another. This makes the job of hackers a nightmare, because they can't just cross-reference your login credentials from a password breach somewhere. Even better, if your address gets leaked to a spam database, just revoke it, and the address will stop routing messages.
As mentioned, Servicemail will proxy all of the email coming to a given address directly to your favorite instant messenger of choice. Since the primary way of replying to these emails is either entering a code in the requesting app, or opening a link inside the email, this solution fits perfectly (and stops those emails from otherwise cluttering up your inbox).
The goal of Servicemail is not to let you breach services' Terms of Service. That is to say, if a service requires your email for personal interaction, or only lets you create a single account within the bounds of their ToS, you may not use Servicemail to bypass that restriction.