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What does this mean?

> error SPF must allow Google servers to send mail on behalf of your domain.

So you must let Google spoof your domain? That seems crazy.

ProtonMail has the same error:

https://toolbox.googleapps.com/apps/checkmx/check?domain=pro...

He's wrong about what this tool provides – namely information for people who want to use GSuite for their email. In that context it makes sense that you have to allow Google "spoofing" your domain, of course. But it has nothing to do with what is being discussed here.

Ah. Thanks. It makes sense now. I didn't read carefully enough.

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