@lucifargundam Wording seems to be my challenge here. The point is that I can send mail to email#sometopic@example.com and it is received by email@example.com and then, possibly if imap has been set up this way, put in to a folder "sometopic". Various email providers support this, and it's an easy way to keep track of logins for types of sites, but I can't remember what this feature is called.