Email spoofing is the creation of email messages with a forged sender address - something which is simple to do because the core protocols do no authentication. Spam and phishing emails typically use such spoofing to mislead the recipient about the origin of the message
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How can I tell if I'm being spoofed? 1. You see mailer-daemon error messages (returned emails) in your inbox that do NOT match any messages you sent out (as if someone sent a letter to another person and wrote your return address on the envelope instead of their own.) 2. You get messages from people who received email from you that you did NOT send.
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How to Counter Measure Email Spoofing? SSL/TLS in mail transfer software can be used to enforce authentication, but is seldom used for this in practice. However a number of effective systems are widely used, including: SPF |
