Email pattern
Also: email format, email naming convention
The rule a company uses to turn an employee's name into a work email address, such as first.last@ or flast@ followed by the company domain.
A pattern is evidence-backed when real company addresses have been matched against their owners' names, and a guess when it is only the most common format for the company's mail provider. Applying either kind to a name produces a candidate address, not a verified one.