How can I post feedback on a trade that was done by beer mail only and not posted on FT:ISO or listed as an open trade?
No reason you can't request a trade after the fact, then leave feedback, providing the other party involved accepts the trade request. Less likely if you're trying to leave Negative feedback...
Go to the person's profile page, click on their beer trading stats, and click 'Request Trade'. Doing so BEFORE beer is sent is much preferred, but is available to do so afterwards as well. As @Five_Four_Plus says, if this is so you can leave negative feedback, and the other person in the trade realizes that, its likely that you won't be able to as the other side has to accept the trade (which is why its better to do this before beer is sent).
Not looking to give any negative feedback. I have only positive remarks and also wanted to give the person a chance to give me feedback.
