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Reference.org
Non-Internet email address
open-in-new
<p>A wide variety of non-Internet email address formats were used in <a href="/facts/Email/6pD9GLtI">early email systems</a> before the ubiquity of the <i>john.smith@example.com</i> form used by <a href="/facts/Internet/Xw1rVvJU">Internet</a> mail systems since the 1980s - and a few are still used in specialised contexts. </p>