Does that email still exist?
If it is someone@hotmail.com the email account might have been deleted since you don't use for a long time. Maybe you can create a new email with the same username (if available) and receive the blockchain.com email.
This might work.
It can not work, he needs the original email to be able to access the wallet. An authorization email will be sent to the old email before access.If it is someone@hotmail.com the email account might have been deleted since you don't use for a long time. Maybe you can create a new email with the same username (if available) and receive the blockchain.com email.
This might work.
Attached email still exist so unable to create new email from same username 
Only what you can do this time is to further to contact blockchain.com customer care. For faster response, use the Twitter support as suggested by dkbit98 above. Thanks Bro