Samsung S6 edge don't open or save pdf files in email

I have 2 mail accounts setup... private and work. Work one opens pdf docs on my samsung s6 edge but pvt one doesnt. It always worked untill about week or 2 ago. Settings checked... no limit set and auto downdload checked... still when you click on the pdf attachmen it just runs as if it is busy opening or saving... but never does. Please help