Search for Message

How to search mailslots.

There is a mailslot search option in
Console | Tools | Search for Message.

Mailbox
Selecting a mailbox in the tree presents a search dialog that will search that mailbox.
A date range should be set.

Mailbox Archive
Selecting a mailbox archive in the tree presents an expanded search dialog with an additional 'Mailslots-tab' that iteratively searches all the mailslots.

Additionally, you can select specific mailbox Archive/s to search. When you set the Archive-tab in a Mailbox messages are physically moved to a different .afx file so there is also an option to search the Archives.
 
Read more about Archiving

Results
Search results can be 'double-clicked' to open them in a message viewer, or you can select a result and use the button controls in the dialog to Open, Move, Copy or Route the message.