I see other posts similar to mine, all with the same boiler plate answer about changing/checking through the preferences tab under edit. Been there, done that, so PLEASE, PLEASE PLEASE don't just say to do the same steps again!
I have deleted the existing default e-mail and re- added it. I have added other e-mails, making them the default, I have even created a dummy Gmail just to test that method. Quickbooks still says passwords are incorrect. I have even gone so far as to change all of the prospective e-mail passwords, just to make sure there is no problem with my keyboard. While I can log in to the e-mail accounts with the new passwords, Quickbooks says every last one of them is incorrect.
To be clear: yes, the passwords I am using have all been correct!
I only need to e-mail once a month, with invoices. I have had no problems in the past. If I recall correctly, a few weeks back, I couldn't work on receivables because QB needed to update. This being the first time I need to e-mail since, it would stand to reason that perhaps there was a problem with that update??
Please help (other than cutting and pasting the standard boiler plate!) QB 2019 BTW