Is it so that if I use Oxchat than the users can only see my messages on clients that support giftwraps ?
Those of you that are seeing reports and notes from a new DM Reporter bot need not fear the reports. They again are a form of education. This is how we grow and improve.
These bots are telling you that the client that you're using to DM others is leaking metadata such as who you spoke to and when you spoke to them. The conversation itself is encrypted.
How can you stop this from happening?
You need to switch to a client that uses better DM technology such as Amethyst, Snort, Iris, etc. or just use nostr:nprofile1qqs9ajjs5p904ml92evlkayppdpx2n3zdrq6ejnw2wqphxrzmd62swspzemhxue69uhhyetvv9ujuvrcvd5xzapwvdhk6qgdwaehxw309aukzcn49ekk2qghwaehxw309aex2mrp0yh8x6tpd4ehgu3wvdhk6ynf30t for all of your DM needs.
Discussion
In Amethyst I can see my 0xchat's. I think your client must support NIP-44 to receive gift-wrapped messages from any other client.
"Gift-Wrapped DM is default and recommended DM type for 0xChat. By using Gift-Wrapped for event messages, it minimizes metadata leakage. Not only is the message content encrypted, but the sender and the timestamp are also concealed. Moreover, the encryption algorithm employed is the latest audited NIP-44 algorithm".