I have a dump of contacts from a different program, it started life as an Excel (old 2003 format xls) file. I need to massage this data to work in modern mail programs, the eventual target is GMail ...

A PST file is a comprehensive backup of all your data stored in Outlook. If you want to switch from Outlook to Gmail, importing a PST file is the best way to transfer the most data with minimal work.

Gmail's web application includes a tool that allows you to import your mail and contacts from other mail services, including AOL Mail. Importing your mail allows you to keep all of your email in one ...