Documents vanished after replication

last 30 days emails got vanished from local copy of mail file lying on laptop after replication.

In replication history it shows 431 mails deleted. bu why & how that is not logged.

Server copy does not have all mails, local copy’s backup is not there. How to Recover?

Server - XSeries

OS - Win-2000

client - 6.0.3

laptop os - win ME.