I'm using Fastmail and its web interface as my email client and I'd like to clean it up but save multiple hundreds of emails to some text-based format.
Is there any macOS email client or utility that can do it?
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Sign up to join this communityYou can use Mozilla Thunderbird, with ImportExportTools plugin.
If you need a step by step guide, here is one with images, is quite old, but gives the idea. Use software/plugin from Mozilla site.