The Bounce feature may not work with some email service providers, and may actually indicate to the originator that your email address is valid.
Consider these alternative ways to manage unsolicited mail messages ("spam") instead of the Bounce feature:
- Use Mail's built-in Junk filtering, which can both be set automatically, or be set to learn as you receive mail messages. For more information, see Mac 101: Mail.
- If you use iCloud, you can use an email alias. This feature can allow you to purchase items online with an additional email address that protects you from receiving unsolicited mail messages. See iCloud: About email aliases.