To protect your email from being used to send spam or malicious messages, there are several precautions you should take:

1. Set a strong, unique password: Make sure your password is at least eight characters long and contains a mix of upper case, lower case, and non-letter characters (e.g. numbers, symbols). Don’t use a dictionary word or a common phrase.
2. Update to the latest version of your webmail provider’s software: Some providers offer two-factor authentication for added security, which requires you to use one-time codes or plug in other authentication devices.
3. Avoid clicking on links contained in suspicious emails: If an email looks suspicious, chances are it contains a link that may take you to a malicious site or download a virus or other malicious program.
4. Frequently check your email’s blocked and quarantined folders: This will help you identify any malicious emails that may have slipped past your security measures.