I use the "snooze" feature in gmail for this. When I get an email confirming a subscription, I snooze it for 29 days or however long so I get the same email in

I use the "snooze" feature in gmail for this. When I get an email confirming a subscription, I snooze it for 29 days or however long so I get the same email in my inbox before expiration which reminds me to unsubscribe.