Mailtraq provides comprehensive search facilities from the 'Search' button in the main 'Email' view of webmail.
The '[ ] Find' action gives a quick message finder facility direct from the main message view page.
'Search' opens a view on a more sophisticated search facility.
The contents of every message in your mailbox will be searched for the given text. Only messages containing that text (in the header or body) will be displayed in the browser.
You can change back from the 'search results view' to the normal mailbox view by clicking the [Clear] button in the browser.
Importance of Indexing
Mailboxes must be indexed to be searchable.