Hi @tgifol
We are working on HTML emails from the client which will support screenshots that are pasted into emails. It only works the other way around if you copy and paste a picture in a ticket in the ITFlow app the clients email will get it. We are running into some issues implementing it and its totally on the high priority list.
However in the meantime file attachments are currently implemented so a client could attach a file to an email like a screenshot jpg ,png file etc
Also if the client logs into the client portal they should be able to easily copy and paste a picture into a ticket reply there.