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Mail Duplication on Client side(Outlook and LiveMail)

Posted: Fri Sep 20, 2019 9:07 am
by damith
Dear All,

I'm running Zimbra mail server(8.8.11_GA_3772.FOSS) and my users are used 3rd party mail client(Outlook and LiveMail) to send and receive emails. Many of their emails are duplicated. I havent any idea for how this was happening. Please guide me to resolve this issue.