Aid4Mail can filter/search email messages (header and/or body text) by date or keyword, and supports logical operators, wildcards and regular expressions. But it cannot search attachments.
However you can use Aid4Mail to extract attachments and then use X1, or some other desktop search tool, to find matches in them.
If you experience any issues, please don't hesitate to contact us by raising a ticket.
If you would like to buy an Aid4Mail license, visit the Aid4Mail website.