“Winmail.dat” attachments when email is sent from Outlook to Thunderbird

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My sister has Outlook; I have Thunderbird. Whenever she sends me an email with an attachment, the attachment is a useless item called “winmail.dat”.

She was unable to fix it on her end. But I found about a Thunderbird add-on called “Lookout”. I installed it in Thunderbird, and I was then able to successfully open the attachment she had just sent me in an email.

Go to addons-dot-thunderbird-dot-net and search for “Lookout (fix version)” (without the quotes). Download it and install it as an extension in Thunderbird. Your winmail.dat troubles will be over!

Group "L" (Linux Mint)
with Windows 8.1 running in a VM

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Bob99

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Hi Jim!

I had the same issues a few years ago, but I was able to get the sender to change their configuration for mail sent to me to be sent in HTML instead of RTF.

This sounds like a godsend for anyone unable to successfully change a configuration within Outlook!

BTW once you go to T’Bird 115, from what I saw on the product’s page you’ll have to go to version 6 or 6.1 of LookOut (fix version) because 5.4 only goes as far as T’Bird 102 but the other versions start their support of T’Bird at version 115.

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Thanks for that information. I knew I would eventually have to upgrade my version of Lookout, but I just wasn’t sure how long that would be. Man, I just got this one; I hope I can keep using it for a while!

I sent my sister a link to the Microsoft article which told exactly what to do to fix it. She did just what they said, but it didn’t fix it. So I fixed it on my end.

I guess I’ll have to be on the “lookout” for when I need to upgrade!

Group "L" (Linux Mint)
with Windows 8.1 running in a VM

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