There are companies which have more than 1 email pattern. But eGrabber tools only rely partially on the email pattern. There are other factors that we look into do decide which pattern to use.
By default, eGrabber tools will check the dominant email patterns of the company which are found through live web research. The results are compared with other signals and evidence, like email verification results from our 3 vendors, and the email with the best rating is chosen.