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You would need to read mail with a third party app.

You can still manually fetch the mail.

Manually fetching would still execute any malicious code contained in the mail if I understand the article correctly. The only way to be protected seems to be to not use Mail.app until iOS is patched.

Correct. If you fetch mail, you're vulnerable (at least that's my understanding).

You can use third-party apps, or Safari if it's a webmail.