IMO Aliases help. there is a difference though that people often overlook : Some services like Outlook mail and Apple mail (for free ones) do not allow you to

IMO Aliases help. there is a difference though that people often overlook : Some services like Outlook mail and Apple mail (for free ones) do not allow you to log in with the alias. This could be considered more secure, I guess. In contrast, In others (like yahoo and gmx) you can log with any of them, and they are also all clearly "visible" (in the settings).