🐛 Bug Report: Email from other targets/users are sent to all targets by default

[JoshiJoshiJoshi]

👟 Reproduction steps

1. Add two or more users to a messaging topic.
2. Send an email either via console or api and select that topic.
   OR
3. Send an email either via console or api and select two or more different users as target.

👍 Expected behavior

The users receives the email AND the email DOES NOT show the email from the other targets or users in the same topic.
Other users should not know the email from the other targets. This can be considered a data breach and maybe not GDPR compliant.

👎 Actual Behavior

By default Appwrite shows the user/target to all other targets as well.

🎲 Appwrite version

Version 1.5.x

💻 Operating system

Linux

🧱 Your Environment

Appwrite v1.5.7

👀 Have you spent some time to check if this issue has been raised before?

• I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• I have read the Code of Conduct