Unproven, at this time.
There is no reliable proof either way whether these emails are authentic.
At best, these emails fit with established theory - either that Biden was corrupt, or that Russia is trying to interfere in US elections. However, fitting with already-believed theory is not proof.
After Fox passed on the story for ...
These are not exact quotes, but paraphrased, with significant context removed.
Joe Biden (end of January):
“We have, right now, a crisis with the coronavirus,” Biden said in Iowa Friday. “This is no time for Donald Trump’s record of hysteria and xenophobia - hysterical xenophobia - and fearmongering to lead the way instead of science.”
Nancy Peloci (end of ...