Did you know Gmail lets you add tags to your emails? Let’s say your email is
email@example.com. You could also use
firstname.lastname@example.org to subscribe to a site, and the emails would still reach your inbox.
Since you filter emails by destination address, you could create a filter that automatically assigns a tag to those emails, or deletes them. Moreso, if you subscribe to freeemoticons.com with
email@example.com, and you start receiving spam destined to that email, you know who to blame.
It’s also good to know that Gmail doesn’t check dots in email adresses, so
firstname.lastname@example.org will reach