Many thanks, I did look at their FAQ before my post above yours.
It still appears to me that I still have to look at all my individual emails, albeit via mailwasher, on my email service provider's remote server. Unless I am reading it incorrectly I am sort of moving the process one step nearer to my email server. I don't quite see how this is reducing the 'fatigue' of having to deal with spam?
However, when I next have a free day I will download the free version and give it a go and report back as to how I get on. Thank you for your advice, it is appreciated.