Gmail changes, 2FA, Quickbooks

Not sure anyone can help but not sure where else to ask. Gmail’s recent changes have warning boxes coming up on a clients Quickbooks to make changes in the gmail account. We send invoices and statements from this Qiuckbooks. I followed the instructions to make the changes but ran into the issue with it now wanted two factor authorization. This client doesn’t even have a cell phone and gmail is not giving me another alternative (ie setting the 2FA to a second email would be acceptable)

Can anyone recommend any other free email providers I can have them switch to for this? Or a way to do the 2FA to email? I have an old yahoo account and even that is now asking if I want to setup 2FA.

(because I have nothing else to do with my time than be held hostage to googles whims)

Thanks!
Diane