I need the ability to create individual SMTP accounts for each of my email addresses. This would allow me to manage each account separately, with its own SMTP credentials, including account, password, server, and port. This feature would be particularly useful as I manage over 50 email accounts.

As a new marketing agency managing multiple clients, I find it cumbersome to create separate accounts for each client. It would be beneficial to have a sub-account feature that allows me to manage all my clients under one main account, similar to other email services. This would streamline the process and make account management more efficient.

As a multi-tenant SaaS product company, we need a sub-account feature similar to SendInBlue's. This would allow us to manage multiple customer accounts under one main account, ensuring that if one customer sends spam, it doesn't affect others. This feature would help us maintain separate sending reputations and manage accounts more efficiently without requiring each customer to create and manage their own account.

If a security issue arises with one domain, I would like the ability to block only that specific domain instead of the entire account. This would help minimize disruption to other domains and avoid unnecessary explanations to customers about unsent emails.