Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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Full Mail box

Ken Allison

I have deleted 4 years of emails and yet you now say my mail box is 85% full. How can that be. What do I do to change this ? I need to maintain a system of emails and contacts for years at a time

I have deleted 4 years of emails and yet you now say my mail box is 85% full. How can that be. What do I do to change this ? I need to maintain a system of emails and contacts for years at a time

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Please understand that Thunderbird is only a messenger; it has no intelligence to manage your storage capacity. One way would be to use your PC to store messages, or use a third-party cloud facility. Your best bet to verify the accuracy of your storage allotment is to check online with your email provider.