Explanation
The primary concern will be to comply with legislation and regulation but only if this is a genuine business requirement. Best practices may be a useful guide but not a primary concern. Legislative and regulatory requirements are only relevant if compliance is a business need. Storage is irrelevant since whatever is needed must be provided

Rebuilding the system from the original installation medium is the only way to ensure all security vulnerabilities and potential stealth malicious programs have been destroyed. Changing the root password of the system does not ensure the integrity of the mail server. Implementing multifactor authentication is an aftermeasure and does not clear existing security threats. Disconnecting the mail server from the network is an initial step, but does not guarantee security.

Section: INFORMATION SECURITY GOVERNANCE
Explanation:
Performing a risk assessment will allow the information security manager to prioritize the remedial measures and provide a means to convey a sense of urgency to management. Metrics reports are normally contained within the methodology of the risk assessment to give it credibility and provide an ongoing tool. The business impact analysis (BIA) covers continuity risks only. Return on security investment cannot be determined until a plan is developed based on the BIA.

Information security controls should be proportionate to the risks of modification, denial of use or disclosure of the information. It is advisable to learn if the job description is apportioning more data than are necessary for that position to execute the business rules (types of data access). Principles of ethics and integration have the least to do with mapping job description to types of data access. The principle of accountability would be the second most adhered to principle since people with access to data may not always be accountable but may be required to perform an operation.