Mailboxes are always a weak link in your security. That is why the implementation of MFA (Multi- factor authentication) on all accounts is definitely necessary.

This method of verifying the authenticity of a user in more than one way tightens security in access control. This means that only the authorised person can access the mailbox.

At NetServ we go for two factor authentication: both a password and an SMS or authenticator app are required to authenticate.