My situation: Customer on 4.3 EES --- > Sage 100 ERP 2014.
Ran fine for the past few years on 4.3. I'm presuming that there may be a timeout issue (and I could swear someone mentioned that regarding paperless email but cannot find it).
I have a problem with the IT people so as a last resort I probably will set them up with Gmail, print and prove it's not Sage then they can decide whether to pay me to babysit IT.