I have a permanent reply to address highlighted in red I cannot delete can someone help

[Helen-]

hi can someone help me please, my sky email has been hacked, I have gone in and deleted any filters, the problem I have is in my 'reply too' email addy I have another email address of mine except it has a number 1 after my name and is highlighted in red.  It appears to be linked to yahoo account as each time I place my default email address into it and press on yahoo email pic to the left it defaults back to incorrect address.  I want to delete it but I cannot any one able to advise 

[caesarome · Accepted solution]

As well as changing your password and possibly setting up 2 factor authentication have you gone to this:

Settings > More Settings > Mailboxes > Your email address > Reply-to address and removed the Yahoo one.

[Helen-]

Thankyou for your help that has done the trick