eMail lost by replication

Hi~

I have several Domino email serveres and users access their mails by replication to local. The domino/notes version is 7.0.2 and OS is windows 2000.

Recently, I found some strange cases reported that 1 or a few emails will be lost during the replication process. Some mails which are on server mailbox can not be replicate to local DB. other mails are normal during replication.

After I clear the “replication history” or “replace the design” of local mail DB, the lost mails can be replicate to local and it seems back to normal. But some days/weeks later, the lost cases will happen again.

These “lost” case happened on several different users of 1 domino server. The “lost” mails is less than 1% of total mails

any suggestion? thanks in advance.