Ah, Coop will **try** to subscribe to a user's DM relay (NIP-17) when it receives the user's relay list (NIP-65). this apply for current user and their contacts. The purpose of this is to ensure the local database contains all necessary data. When a user sends a message, the Nostr SDK won't need to perform **the** fetch DM relay step.

You can check my **detailed explanation** for fiatjaf **here**: [https://github.com/lumehq/coop/issues/87](https://github.com/lumehq/coop/issues/87).