Comcast is boosting internet speeds, but not for cord-cutters

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10. I am a Spectrum customer. I use my Gmail address and Outlook.

Just change providers. If I am understanding you correctly, your Outlook program set to fetch emails from your Gmail account will work the same regardless of the provider. It's just like taking your computer to a place with a different Internet provider. You still can access your Gmail messages there or anywhere else when connected to any provider.

Spectrum, like the others, gives you an email address tied to Spectrum. You do not have to use it.....just use the same Gmail address. I have a Roadrunner email address I don't use.

On edit: You could set your Outlook to fetch email from both the old Gmail account and the new one given you by Spectrum, but if you do not use the Spectrum account, there would be no reason to do so.