That is Phishing
Mark, look into Yubikey as a 2nd factor.[1] it's a two step process,
add your phone to set up second factor and then add Yubikey token as
the preferred 2nd factor. If you use a phone to check on your Google
account, add the Google Authentication as an alternative. (and print
out a sheet of secret keys just for emergencies)
[1]  https://support.yubico.com/support/solutions/articles/15000006418-using-your-yubikey-with-google
On Mon, Aug 27, 2018 at 3:17 PM Mark Phillips
<mark@phillipsmarketing.biz> wrote:
>
> I keep getting alerts from Google along the lines of
>
> Sign-in attempt was blocked
> mark%phillipsoasis.com@gtempaccount.com
>
> With a button to "Check Activity". The button takes me to a Google sign in page for mark%phillipsoasis.com@gtempaccounts.com asking for my password. I don't use this address. I do own the domain phillipsoasis.com and have an email address mark@phillipsoasis.com
>
> Is this a scam/spoof or something real?
>
> Thanks!
>
> Mark
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