Try SysInspire NSF to PST converter software. It can easily import an NSF file from Lotus Notes to Yahoo Mails. It has many features such as name convention users can change the name of an NSF file. And users can change the saving location of the PST file after the conversion. It is 100% secure and fast users can download this from Sysinspire.com. It has a demo version where users can convert 25 files from each folder. It can support all versions of Lotus Notes and Windows operating systems. It has technical support and all users can get help by using mails or live chat.