Looking for a new windows email client

I have been using MS Outlook 2003 for years as central part of my GTD system.

Lately, I have grown apprehensive about the crashability of Outlook. I am also not comfortable with the .pst file as I feel that if it crashes I won't necessarily be able to get it back.

I have used Outlook 2003 only because I felt that it was best for syncing with windows smartphone.

Has anyone here switched to a different software set with smoother operation and less concern?

David
 
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