Hello,
I'm sure tthat one important future is absent in mozilla email client,
it is possibility to search and find email dublicates.
My experience: in my chance it happened few times -
accidently email client started to download all messages from the server,
again, from the first one, instead to download only several new of them.
These times I had to download again all messages from the server, these
times is was
about 2 - 20 mb, which was very unpleasent  but possible if not to sleep
a night.
But situation bacame really bad since mail.ru, gmail and others extended
quater of mailbox size.
If take in concideration that now I have about 3500 messages in mailbox
on the server,
and some of them more then 1mb you can imagin the problem to download again
about 250 mb emails via dial-up.
Finally I  had to interrapt to use the mozilla client, because I need to
download 250mb
before to receive few new mesages.
(in between about this problem: one time it happened after I renamed
some folders on the server and
removed some messages to different folders, but in other situations it
happened without
visible reason, just happened)

Now, I like other futures of mozilla client and would like to continue
to use it.
Maybe I will spend time to download whole mailbox again, and then I will
have to delete dublicates which I dont need.
But there is no future to search dublicates in mozilla mail client.
Yes, I can move messages from inbox to another folder before downloading
dublicates,
but I mist be sure that all messages downloaded again are really
dublicates.
Only dublicates search can help in this chance.

Please pay attantion to my message and let it know to developers.
Dublicates search exists in TheBat and other clients.
Outlook Express 6 doesnt make this kind of mistake and always download
only new messages.
I prefere mozilla client but I will have to change to Outlook Express if
this problem will not be solved.
I think that a lot of other people may experience similer problem.

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Sergeys 30.04.06