Thunderbird.Incredimail.Windows Live mail.
I suppose Thunderbird may be the easiest to install but as I have never used it I am not sure if it works with W/7 or not but I would imagine it would.
Surface Pro (2017) vs Surface Pro 4
20 groundbreaking 3D animation technologies coming to Siggraph 2017
iPad Pro 12.9 vs Surface Pro 5
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.