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Email Freezing

Pitzer Amy 20 Reputation points
2026-05-20T14:22:20.7833333+00:00

My "classic" outlook freezes when replying to a specific recipient. I have to delete the body of the email from the recipient in order for the email to send. The email varies in size from small to large. Can you please help me?

Outlook | Windows | Classic Outlook for Windows | For business
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Jayden-P 22,645 Reputation points Microsoft External Staff Moderator
2026-05-20T14:57:02.7933333+00:00

Hi @Pitzer Amy

May I ask what is your Classic Outlook version> You can check this in File > Office Account > About Outlook.

You mentioned this only happens when replying to the specific sender, does the email body contain any suspicious format, links, signatures or images?

If you go to https://outlook.cloud.microsoft/mail/ and reply with that exact email, does it work?

If yes, this could indicate a render issue in Classic Outlook.

Please test if reply in plain text works. If it does, that means the content of the body has issue.

To reply in plain text: Open the reply email > Go to the Format Text tab > Click Plain Text.

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This removes all HTML formatting (images, styles, hidden elements) and could help in avoiding the freeze.

If it works, you can consider setting compose message in plain text as default. Or manually set to plain text every time you reply to this specific sender.

To set this: File > Options > Mail > set to Plain Text.

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Please try and let me know how it goes.


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  1. Pitzer Amy 20 Reputation points
    2026-05-20T15:41:40.52+00:00

    Microsoft® Outlook® for Microsoft 365 MSO (Version 2604 Build 16.0.19929.20172) 32-bit

    I do not see any suspicious formats, links, signatures or images. It is from another ZIM email.Yes, it works in the new outlook (the link you provided), but this was causing errors. I share a group email inbox with a coworker, and it does not show when I have responded to an email (its missing the response arrow icon). This was causing a lot of confusion. Therefore, I went back to the classic email.

    The plain text does work. I will try this and let you know if there are any future issues.

    Thank you.

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