Before opening emails or messages from unknown senders, please keep in mind the following:

1. Before opening an email, check the sender and the email address to make sure it's from a legitimate source.
2. Be especially mindful if there is an attachment.
3. Do not click on any links or open any attachments in the email without exercising caution.
4. Cross-check the URL of suspicious links to verify their authenticity.
5. Ensure the sender fidelity and check for spelling mistakes or suspicious language in the content.
6. Use anti-virus protection, so you can detect malicious links.