Make a suggestion that would do this
Owner A agrees with Owner B on a deal.
Owner A sends email to the league commish and copies Owner B on the deal.
Owner B confirms.
This way you do not get the other owners making side email comments.
I'm not a big fan of other owners "babysitting" the other owners. If one person does not do their homework, and agrees to a bad deal, its their fault. On the flip side, some people have different ideas on why to make a trade. During Beltran's breakout season, I dumped Beltran to another team for a draft pick and a better then decent closer, just not a great one. I ended up winning the league that year and the following year even though I gave up on Beltran as a keeper.