NIP-101
======

Mailing lists
-------------

`final` `optional` `author:KaffinPX`

Mailing lists are subscriptions for receiving materials from inviduals or organizations, `kind 1923` can be used for subscribing to mailing lists owned by an user.

`tags` MUST contain an entry identifying the invidiual or organization subscribing to, in the form of `["p", "<pubkey, as a hex string>"]`.

The `content` MUST contain a valid e-mail address encrypted by same method of encrypted direct messages(NIP-04) for subscribed pubkey.

`tags` MAY contain an entry identifying the topic subscribing to, in the form of `["t", "<topic>"]`.

**As example:**

```json
{
  "kind": 1923,
  "tags": [
    ["p", <pubkey>],
    ["t", "nostr"]
  ],
  "content": <encrypted example@test.com>,
  ...
}
```

After that, invidual or organization can fetch, filter, decrypt and check events for subscribed e-mail addresses.  
Can be unsubscribed from mailing lists by event deletion(NIP-09).