Hi Gina Jolliffe
Thunderbird is not a Microsoft product.
You can receive support from this page:
https://support.mozilla.org/en-US/products/thunderbird
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Lately TBird keps freezing then one has to close it. It's irritating, and I really can't be bothered with checking the profile or reinstalling. However, for a quick fix, when composing on TBird, Gmail keeps a copy as draft. So you can go there and complete your email quickly.
I don't know if hotmail has the same facility, I don't use it.
Answer accepted by question author
Hi Gina Jolliffe
Thunderbird is not a Microsoft product.
You can receive support from this page:
https://support.mozilla.org/en-US/products/thunderbird