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How do I filter incoming mail and route it to a specific file?

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I am using mozilla for my mail service. I want to filter emails that include the string "classified" in them to a specific file. How do I set that up?

I am using mozilla for my mail service. I want to filter emails that include the string "classified" in them to a specific file. How do I set that up?

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Do you mean that you are trying to use Mozilla Thunderbird?

You can seek Thunderbird help from their support forum here.

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So... Mozilla has the Firefox browser and the Thunderbird email client.

For Firefox, since all mailbox routing would be controlled by the features of the webmail service, the answer would depend on which site it is.

For Thunderbird, check out these articles:

More support here: https://support.mozillamessaging.com/en-US/home