A password manager can store an email address, but storing a temporary address does not preserve access to its inbox.
This distinction matters when a website later requests email verification or sends an account recovery message. Your password manager may remember the correct login details while the registered inbox is no longer available.
For accounts you intend to keep, use a lasting address. Store credentials securely and configure the account’s supported recovery options.
If you record a temporary address for a short-term account, label it clearly so you do not mistake it for a dependable recovery channel.
Never assume that saving an inbox URL or address guarantees future access. Availability depends on the temporary email provider’s actual access and retention rules.