My email address is `first.l@gmail.com`, with my first name (common) and last initial. I receive a lot of erroneous signup emails. There's nothing wrong with se

My email address is `first.l@gmail.com`, with my first name (common) and last initial. I receive a lot of erroneous signup emails. There's nothing wrong with sending a single email, so my usual course of action is to delete them. However, I expect sites to send no more than a single email to unverified addresses. If I receive subsequent messages from the same site, I mark them as spam. Gmail usually takes care of unsubscribing for me.