Four decision criteria
Use the matrix instead of choosing by instinct
If any factor involves future recovery, sensitive data, or long-term responsibility, move up to a more stable address.
Decision factor
Three-hour temporary inbox
Long-term email alias
Regular email
Contact duration
Current session
Weeks to years
Long-term essential relationship
Future recovery
Not needed
Recent history needed
Reliable recovery required
Primary email separation
Fully separated
Separated and pausable
Not separated
Data sensitivity
Low-risk only
Routine notifications
Financial, identity, and contractual data
Typical tasks
One-time verification code, short-term download
Subscriptions, communities, shopping notifications
Banking, work, healthcare, government