Quick solution: You can use this tried and tested third-party utility to directly migrate Lotus Notes Database (.nsf) to PST format without implementing long and complex manual steps.
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If your email in Lotus Notes is in the POP configuration then it will be difficult to transfer Lotus Notes emails to Gmail. Although a direct method is also available, all you need to do is to migrate Lotus Notes to Gmail and then use GAMMO tool to transfer PST file details to Gmail. This will allow the user to import NSF to Gmail. To do so a user can follow steps given below:
Method : Import or Migrate Lotus Notes to Gmail via PST
This Method is simple and convenient and allows the user to convert and migrate Lotus Notes to Gmail via PST. Now, To do that follow the steps given below:
Configure common email in Outlook and Lotus Notes with IMAP configuration.
Now, copy all Lotus Notes emails and contacts to that mail.
All Lotus Notes emails and data will automatically be transferred to Outlook.
This May Work,
Peter