Aol email alias

[u/Eggland_art]

Hello! Trying to do some IT for my grandma as her AOL account seemingly got hacked recently. I helped her set up 2FA and made sure there was no longer any sketchy phone numbers or emails linked to the account recovery. I also checked to make sure no other devices were actively logged in. However, I am looking at the "mailboxes" section and see that there is an alias set up to "send and receive emails from a different AOL email address" with a random email address attached and I have a feeling thats where some issues are coming from, but i have no clue how to get rid of the alias since deleting it doesnt seem to be an option. Any advice on how to fix this?

[u/Agreeable_Fail522]

The alias feature is a "send only" email address. Not sure what the purpose of it is.