Have a look at http://community.pmail.com/forums/post/4965.aspx

<p>Hi, hope someone could tell me how to do this.</p><p>Currently i'm using an Xmail on linux, and now i need to migrate my users to Mercury on Windows. Is there anyway to mass create users in Mercury, like use a list or something then create users in Mercury from there? Quite tedious to create the users one by one, hope there'll be a quicker solution for this.</p><p> Thank you. </p>