A directory harvest attack (DHA) is a technique or method used by spammers to find valid email addresses at a domain. A DHA uses a trial-and-error strategy called a brute force attack or exhaustive key search in an attempt to discover valid or existing email addresses in an SMTP mail server. The brute force approach tries all possible alphanumeric combinations used for a common username, which is the part that comes before the @domain of an email address.
Owner at Cape Cod Office Consultants
Having been in the IT field for over 20 years, Rick takes his experience working at a large company and applies the same methodology to small businesses so they can benefit from enterprise solutions at affordable prices.
Latest posts by CCOC Rick (see all)
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- Data Recovery from a Broken RAID Array?Yes, We Do That! - September 10, 2020
Directory Harvest Attack (DHA)