Be careful with email auto-complete. This is an email feature that automatically completes a name for you when you begin typing it in the TO field. However, your email client can easily complete the wrong name for you. If you are emailing anything sensitive, always be sure to check the TO field a second time before hitting the send button.
This is also especially important when you’re replying back to people. When you receive a phishing email from someone with a similar address you trust/recognize, your email client can easily complete the name for you without double-checking. Always be sure to check the TO field a second time before hitting the send button.