For us it is important to disable this default grey background color on forwarding/reply mails or at least on printing html mails.
It would be perfect, if there will be available an enable/disable checkbox in the GW Admin Console in the "Client Options".
remove this grey background and replace it with a slim border on the left side. (such as other mail clients)
: Please think a bit "green" and protect the environment.
Thanks for implementation!