Temporary email for free trials
Free trials are one of the cleanest fits for a disposable inbox. The product usually needs a quick confirmation email, but that does not mean you want months of follow-up reminders, upgrade prompts, and partner offers flowing into your real inbox afterward.
Why this use case is distinct
The goal here is not anonymity for its own sake. It is inbox hygiene and decision control. You want to evaluate a service on its merits without creating a long-lived marketing channel before you even know whether you like the product.
Best workflow
Generate a Susmail inbox, use it to complete the initial trial signup, and finish any email verification while the inbox is active. If the product proves valuable and you intend to keep using it, move to a permanent email you control before the account matters for recovery.
When not to do this
If a trial is likely to become an important paid account, start with a real email instead of treating a disposable address like a permanent identity. The convenience of a throwaway inbox is not worth losing the recovery path for something you may rely on later.