If you are searching for the solution to import PST to Gmail then you should read this, to open PST files in gmail, I tested manual method to open my PST files in gmail account, in manual method I use a outlook and thunderbird, after using this I found outlook and thunderbird is time taking and risky, then one of my friend suggest me a converter program which I used personally and got my result instently. i.e., Advik PST Converter. This utility directly imported all my PST files into my Gmail account. After the use of this, I realise that we the use of a smart solution, we can easily open our PST files in Gmail, so I would like to suggest that all users who are searching for a hassle-free solution to import PST files into a Gmail account they need to try this.