Spammers often alter the From field on emails they send so that they appear to come from another email address. They do this because it is more likely that someone will open an email if it appears to be from themselves or someone they know and trust.
We do our best to prevent spam from ever entering your Inbox. When an email with a forged sender email address does make it through our spam filters you will see this warning:
Warning: This message may be forged. The return path (email@example.com) does not match the from address.
Be careful when opening an email from a forged sender. Do not open any attachments or reply to the email unless you are certain it is safe to do so.
When you receive one of these emails, click Report Spam to help us automatically block similar messages in the future.