If you check the box, the following technical details are appended to your message to establish credibility (proving you are a real user, not a bot):
- IP Address & ISP: To verify residential network status.
- Timezone: To match message timing with location.
- Location: Approximate City/Country based on IP.
Full Anonymity: If you leave the box unchecked, these details are not sent to the recipient. The server uses your IP solely for temporary spam rate-limiting and discards it immediately after.