CloudFlare email protection

Nobody has claimed this yet.

Is it intentional that it obscures phrases that look like email addresses (visible when JavaScript is disabled)? Presumably also happening with Fediverse accounts, root prompts, etc.

* https://archive.matrix.org/r/securemessagingapps:matrix.org/date/2023/04/10T22:22?at=$R1-F8XOD4IWi3aiOQEKxyj-Jtn2k05WPjwCqfwzyQ7Q

```
.
💬 (k) Hello from xmpp:[email protected]
```

```
{
"content": {
"body": "💬 (k) Hello from xmpp:secuchart@conference.movim.eu",
"format": "org.matrix.custom.html",
"formatted_body": "💬 (k) Hello from xmpp:secuchart@conference.movim.eu",
"msgtype": "m.text"
},
"origin_server_ts": 1681141556603,
"room_id": "!sOLQNHloevPHIEWcYN:matrix.org",
"sender": "@fikabot:matrix.org",
"type": "m.room.message",
"unsigned": {
"age": 4338869075
},
"event_id": "$R1-F8XOD4IWi3aiOQEKxyj-Jtn2k05WPjwCqfwzyQ7Q",
"user_id": "@fikabot:matrix.org",
"age": 4338869075
}
```


Start by reproducing the linked archive example with JavaScript disabled and inspect how the viewer and its Cloudflare setup handle email-like addresses. Done means determining whether the obfuscation is intentional and documenting or correcting the behavior for email, Fediverse, and XMPP-style addresses.

Written by the indexing model from the issue text.