Note that operators and functions must be CAPITALIZED, otherwise they will be treated as a query keyword. Query operators must also be preceded and followed by query keywords or query phrases.
The AND operator may be used to find emails containing both specified keywords.
Outlook AND keyword finds "Outlook search keywords", "how to search keywords in Outlook"
The OR operator may be used to find emails containing either of two keywords.
best OR fast finds "best Outlook search tool", "fast search Outlook"
The NOT operator excludes any emails containing the keyword which follows it.
folder AND NOT email finds "search all folders in Outlook", but not "search all folders and emails in Outlook"
The boolean function ALL(keyword1, keyword2, ..., keywordN) is equivalent to keyword1 AND keyword2 AND ... AND keywordN
ALL("boolean search", "excel-like filtering", "instant search")
The boolean function ATLEASTONE(keyword1, keyword2, ..., keywordN) is equivalent to keyword1 OR keyword2 OR ... OR keywordN
ATLEASTONE(best, free, download)
The boolean function NEITHER(keyword1, keyword2, ..., keywordN) is equivalent to NOT keyword1 AND NOT keyword2 AND NOT ... AND NOT keywordN
NEITHER(email, message, contact, notes, appointment)
The boolean function NOTALL(keyword1, keyword2, ..., keywordN) is equivalent to NOT keyword1 OR NOT keyword2 OR NOT ... OR NOT keywordN
NOTALL(Outlook, Thunderbird, Outlook Express, "Windows Mail")
Search queries can use parentheses to control the logic of the query and they may appear in any combination. Every left parenthesis must have a corresponding right parenthesis. Queries can have nested parentheses.
(search AND multiple AND (emails OR words))
A wildcard characters in a query may be used to searching for multiple items with similar, but not identical data. It allows to search all spellings of the keyword.
Matches any number of characters. You can use the asterisk (*) anywhere in a character string.
search* finds search, searching, searches, searched
Matches a single alphabet in a specific position.
"Outlook 201?" finds "Outlook 2019", "Outlook 2016", "Outlook 2013", "Outlook 2010"
How to use PST Walker
This guide explains how to open, find and extract emails from .pst files and .ost files with portable PST Viewer.
Search multiple .pst and .ost files without Outlook
Boolean search, Excel-like filtering, instant search. Supports any .pst and .ost files: corrupted, orpah, archive, password protected and encrypted files. Export search results to numerous formats. MAPI properties explorer.