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 the search result when searching for the alphanumerical part only.

For instance the word test_1234 is returned when searching for test, 1234 and test_1234.

Other often occurring characters are:

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