New Outlook

Patricia Schurr 0 Reputation points
2026-03-11T19:34:00.7366667+00:00

How do I stop New Outlook from downloading the same emails repeatedly

Outlook | Windows | New Outlook for Windows | For home

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  1. AI answer

    2026-03-11T19:34:09.25+00:00

    For repeated downloads, the documented Outlook issues relate to POP3 and IMAP behavior:

    1. If using a POP3 account against Exchange Server 2010 and messages redownload every time, install Update Rollup 4 for Exchange Server 2010 SP1 (KB2579150) on the Exchange CAS server. This fixes a bug where attachment names are shortened, preventing Outlook from tracking which POP3 messages were already downloaded.
    2. If using an IMAP account and only Sent Items are duplicated, disable saving sent items in Outlook so only the server copy is kept:
      • File → Account Settings → Account Settings.
      • Select the IMAP account → Change.
      • Check “Don't save copies of sent items.”
      • Next → Done.

    If the scenario does not match POP3 with Exchange 2010 or IMAP Sent Items duplication, additional product-specific guidance is not available in the provided material.

    References:

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