GMAIL - Get access to older email Google archived

 

• Open Gmail 
• Type under 'older_than:10y' on the top search bar to look for messages older than 10 years

Options: You can also use the Clean Email app for advanced search options.

GMAIL - Delegate other Gmail account to administrate your emails

 

You can add up to 10 delegates.

• Open your Gmail. 
• In the top right wheel, click Settings then "All Settings"
• Click the "Accounts and Import" tab.
• In the left panel go to the "Grant access to your account" section, and click "Add another account". 
• Enter the email address of the person you want to add. 

The other person who you are allowing to have access to your emails will receive an email looking for approval. Once done, they will see your email in their email list.

This way you share your email and need to share the password.