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.
CCOC Rick
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)
- Happy New Year 2020!! - January 1, 2020
- Not All Encryption Is Created Equal - December 8, 2019
- Protecting Seniors Online from Scams, Hacks and Tax Fraud - December 7, 2019
Directory Harvest Attack (DHA)