The core difference
A permanent address is one you can access for years: it lets you reset passwords, receive receipts and prove ownership. A temporary address exists for a short window and is then deleted, along with everything it received.
How they compare
- Long-term access: permanent yes, temporary no
- Password recovery: permanent yes, temporary no
- Sending replies: permanent yes, Email1Hour no (receive only)
- Exposure to marketing lists: permanent ongoing, temporary ends at expiry
- Accepted everywhere: permanent nearly always, temporary sometimes blocked
A simple rule
Use a permanent address for anything you would be upset to lose. Use a temporary address for one-off interactions you will not need to revisit.
A middle ground
Many people keep a secondary permanent address, or use aliases from their email provider, for newsletters and shopping. This keeps recovery possible while separating it from your main inbox.