can you request your customer to change email client application? such as
ms 2007 to 10 or 10 to 7 or 16. We didface similar issue and solved by
changing email client software.


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Best Regards
Muhammad Tahnan Al Anas


On Sat, Jun 1, 2019 at 6:35 AM Jeff Koch <jeffk...@intersessions.com> wrote:

> Hi List
>
> The problem seems to have dissipated. This issue started when the CPU
> began reporting overheating problems. We shutdown the server and replaced
> the CPU fan. For several days afterwards we began getting 10-20 copies of
> all emails received from outside the server. Even after deleting them they
> would come back. I suspect the mail files weren't being appended with the
> correct code or had an incorrect code and, as a result, dovecot would keep
> sending the same emails out to the email client. Anyway, the problem seems
> to have gone away but what a mess and we had lots of customer complaints.
>
> Jeff
>
> On 5/31/2019 8:01 PM, Angus McIntyre wrote:
>
> I've seen duplicate emails when the server is very heavily loaded. If you
> had any runaway processes that were causing loads to spike, you could get
> duplicates.
>
> Angus
>
>
> On 2019-05-31 09:34, Peter Peltonen wrote:
>
> In the past I remember this kind thing happening with the old Courier
> IMAP.
>
> Upgrading to Dovecot solved the issue.
>
> Buit you probably are running Dovecot already?
>
> Best,
> Peter
>
> On Thu, May 30, 2019 at 3:14 AM Jeff Koch <jeffk...@intersessions.com>
> <jeffk...@intersessions.com> wrote:
>
>
>
> Hi List:
>
> All of a sudden this morning everyone using one of our QMT7 mailservers
> has started getting 6,7,8 copies of each email. This is with IMAP accounts.
> It seems as if the mailserver is not registering or marking the emails that
> they have already been downloaded. I checked and we don't have multiple
> copies on the mailserver itself - just on the email clients that connect to
> it.
>
> Any ideas ? Everything was working fine until this morning.
>
> Regards, Jeff
>
>
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