Template:Search - About Special Characters
Words of indexed emails or attachments, which are a combination of alphanumeric and non-alphanumeric characters (white space, line break, delimiter or other control characters), may get returned as a search result when searching for the alphanumerical part only.
For instance is 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)