Mint stamps exchanges.

In the list of private conversations, there are delete buttons next to every conversations. Can we really delete *other people's conversations* ??

I did not dare try it, because wh....en deleting a duplicate of my own, there was no conformation prompt

When you click that button, that conversation will disappear from your list but it will still be available to your partner. Your partner will see a message that the conversation is closed.
When the second partner clicks on the Delete button, the conversation will be deleted.