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can not set up two factor authentication

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can not set up two factor authentication

I want to set up two factor authentication for my comcast email using my mobile phone as the second factor.

When I try to turn this feature on, comcast requires that I provide a second email.

I have provided a gmail address.  Comcast says they will send a confirmation email to this address.

Problem is that it never arrives.  So Im stuck.  Thired 3 times of 6 weeks.

I call customer support and after an hour on the phone of reading me this instructions, Im still stuck in the same place.

Without a second "verified" email, comcast will not let me turn on the two factor authentication using my mobile phone.