Thanks for your suggestion.
It works, but it is not exactly the solution I am looking for. Because:
– when making a proxy account of the main account is disabeling the advantage I make of using the quick messages collection for quickly finding the last sent item.
– the current active groupwise window gets the proxied account so when switching to the proxied account I got two groupwise windows with the same account.
I wish I could say to my program, for this message you must use this account and for another message you must use that account.