Disable Postfix NDR

• Many systems disable address verification completely to prevent spammers from harvesting email addresses.
• A Lock-In is similar to a mousetrap in that lock-in code disables your browser's Back Button and prevents you from leaving the web site.
• If you operate a private domain, have your hosting or mail service disable catchall addresses unless you have a good reason to use them.
• Tip: Disable Active-X and Javascript except when visiting trusted sites, and always disable them afterwards.

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