Before running a test its advisable to do the following. Select 3 answers
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Inform the user population about the test
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Inform the QA and system administers about the test
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Backup the database
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Shut down the configured SMPT servers
Pre-test preparations should prevent disruption and enable rollback. Informing users (A) prevents panic from unusual activity. Notifying QA/admins (B) ensures they understand test behavior. Database backup (C) enables recovery if tests cause damage. SMTP shutdown (D) is unnecessary - email testing should be controlled, not disabled.
Good testing hygiene before a security scan includes telling end users so unexpected activity or lockouts aren't alarming, alerting QA/system administrators so they can distinguish real incidents from test traffic, and backing up the database since automated scans can submit destructive or data-altering payloads. Shutting down SMTP servers isn't a standard precaution and would just break unrelated functionality during the test window.