Lost email in "Sent Item" folder

[Keith]

Dear all,

We're using Exchange 5.5 SP4 and Outlook2000 SP3. A user found that some of
his email was lost from his "Sent Items" folder recently. The "Sent Items"
folder only has few items so far. It's unreasonable.

I inspected the problem and his outbound email can be saved in "Send Items"
folder now.

It's quite strange. Experts, do you have any ideas?

Thank you~~~

 

[Lanwench [MVP - Exchange]]

Dear all,

We're using Exchange 5.5 SP4 and Outlook2000 SP3. A user found that
some of his email was lost from his "Sent Items" folder recently. The
"Sent Items" folder only has few items so far. It's unreasonable.

I inspected the problem and his outbound email can be saved in "Send
Items" folder now.

It's quite strange. Experts, do you have any ideas?

Thank you~~~

Autoarchive enabled for some reason?
View filters set on the folder?
Mailbox manager policies running on the server to purge older items?