During the setup of my account, a “phone number” alias was created for me. I never used it and i do not need it. Is it safe to delete it? How about the (same story) firstname.lastname@example.org? (This one is different from the main identity email@example.com.)
Also, the email address I use is (and do not ask me why ) created as alias and also as other identity. Do I need to keep both?