This page lets you specify the DNS servers. This defaults to the servers configured for this computer.
WorkgroupMail uses DNS to work out which mail server to send a particular message to. Take care to ensure that the DNS servers specified here are operational and correct otherwise WorkgroupMail will not be able to send e-mail. Ideally, you should specify both a primary and secondary DNS server, incase the primary server ever goes offline.
Once you have entered the appropriate DNS servers into the fields in this page, click Next