My thought is that commercial email that was never opened and expired
should be moved to the trash, or, at the user's request in the MTA,
deleted permanently. To goal here is to remove unread and expired
messages - the expiry should match the expiration for the deal or the
password reset link or other CRM communication.
If I were to go on vacation and not check my email for a week, I would
have at least 60-70 offers that are no longer valid. These pollute my
inbox and make me frustrated that I signed up for them in the first
place. A much better user experience is to arrive at my inbox and have
only fresh and valid offers.
What do you think?