Mail Terrier can search through endless folders of emails in seconds, using only one keyword, phrase or a combination of either. It’s far more poweful than usual in-built search options as it searches through emails received from multiple programs (Outlook, Yahoo, Gmail, Thunderbird, etc.). Supported file types include: MSG, EML, MIM, EMLX, PST and MBOX files.

Users generally select one word or a phrase to direct Mail Terrier, but it is equally capable of searching for a complex series of words or a specific sentence. For example: the app can find an email containing the words “house” and “buyer” in the body, if there are less than two other words in between the searched terms. But the Mail Terrier could also search for the specific phrase: “blue house with no buyer.” Mail Terrier can also be asked to exclude words from a search.

The app is useful for home users, as well as legal firms or police and investigators, every one who comb through a large volume of emails from a variety of programs in search of a particular piece of information or evidence.