I understand the disconnect being addressed but I don’t think this is the best approach.
Tim Briscoe

That’s a good point. As always, you need to keep in mind the type of users you’re designing for. In our case they are quite technical savvy and many of them use Gmail so this works really well for us.

If you want to play it safe you can choose to only show the button if you can safely assume email provider based on the hostname or using the MX approach.

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