Template:Search - About Special Characters

Words inside indexed emails or attachments which are a combination of alphanumeric and non-alphanumeric characters (white space, line break, delimiter or other control characters), may be returned in search results when searching for the alphanumerical part only.

For instance, when searching for test, 1234 and test_1234, e-mails containing the word test_1234 will be returned.

Other commonly occurring characters are:

  • Comma (,)
  • Colon (;)
  • Hyphen (-)
  • Underscore (_)
  • AT-Sign (@)
  • Slash & Backslash (/,\)
  • Null character (NUL)
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