[BE] Disable unsolicited private or direct messages #3640

Requirements

• [X] Is this a feature request? For questions or discussions use https://lemmy.ml/c/lemmy_support
• [X] Did you check to see if this issue already exists?
• [X] Is this only a feature request? Do not put multiple feature requests in one issue.
• [X] Is this a backend issue? Use the lemmy-ui repo for UI / frontend issues.

Is your proposal related to a problem?

Users can receive unsolicited private or direct messages (PM or DM) in their inbox.

Although a feature like OM or DM can be valuable to some, it can also lead to unwanted, abusive, commercial or otherwise unsolicited messages without the user being able to block them before they are received.

Related issue (deleting unwanted PM or DM):

https://github.com/LemmyNet/lemmy/issues/3629

Describe the solution you'd like.

Add a checkbox in settings where a user can disable a PM or DM being received

Describe alternatives you've considered.

Add the line "No DM" in my profile

Additional context

No response