Inline Message Loading preventing send-out of emails

Jacqui Getfield 0 Reputation points
2026-09-29T17:03:41.1433333+00:00

How do I turn off the "inline message loading in Outlook" so that I can send out email messages?

Outlook | Windows | New Outlook for Windows | For home
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  1. AI answer

    2026-09-29T17:03:49.9166667+00:00

    In new Outlook for Windows, this issue is currently associated with signature add-ins that use inline images. Those add-ins can cause slow inline image loading, which leaves messages stuck in the Outbox.

    To work around it:

    1. Uninstall the signature add-in.
    2. Remove inline images from the email signature.
    3. Try sending the message again.

    A fix has been released for new Outlook for Windows, with rollout expected to complete by September 22 or sooner.

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. Vikki-T 13,945 Reputation points Microsoft External Staff Moderator
    2026-09-30T09:03:55.32+00:00

    Hi Jacqui Getfield,

    “Inline message loading” is not normally a setting that can be switched off in new Outlook. It usually indicates that Outlook is still processing content embedded in the message, such as an image in the signature.

    At this point, I recommend that you review and try the steps provided in the AI generated answer on your thread. That reply typically include the most relevant checks for this scenario. 

    As a quick test, please create a new email, remove the entire signature, leave out all images and attachments, and send it to yourself. If that message sends successfully, please let me know whether your usual signature contains an image or is managed by a third-party signature service.

    Also, please confirm whether the affected messages remain in the Outbox and whether the same emails can be sent successfully from Outlook on the web. These results will help determine whether the issue is limited to the new Outlook app or to the mailbox itself. Thank you so much for your understanding.     

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

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  3. David Rickward 0 Reputation points
    2026-11-09T23:48:13.03+00:00

    We have the same issue and removing the signature did not fix the problem (note our signature does not have inline images). BTW this is really annoying

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