In 0xchat v1.2.2, we change our default DM to Gift-wrapped DM to protect metadata. Please make sure to use other supported clients for receiving Gift-wrapped messages, such as Amethyst, Coracle. Additionally, you can also change the default DM to ‘normal DM’ for each conversation
Secondly, you can set the conversation messages to auto-delete. Messages exceeding the time limit will be automatically destroyed, of course, this depends on whether your relay supports NIP-40 well