To manage emails signatures for multiple accounts:

1. Create template signature – Create a template signature for the accounts with common information such as email address, website, contact details, and social media accounts.
2. Configure email accounts – Set up each account in an email client to use the template signature. Give each account a unique name or identifier to distinguish it from the others.
3. Add custom message to signature – Add a custom message to each signature for each account such as a tagline or personalized message.
4. Set storage location for signatures – Determine where the signature will be stored and how it will be accessed (e.g. cloud storage).
5. Configure mail server to access signatures – Configure the mail server to access the signatures from the storage location.
6. Set the signature as the default for each account – Set the signature as the default for each account so it will be included in every email sent from the account.