@JoesemM Thank you for the response and admitting that this is a problem for many.  

I wonder why the tech support doesn't just admit that it's a problem with Gmail interface, instead of making me jump through hoops for an hour on the phone?  

I have been doing about 3 at a time to get through my large list.  Sometimes it works, sometimes not.  I've been working on our large list for 6 hours now and still have about 100 to try and get out.

Our mail server is hosted at Google, so I don't think shifting to Outlook will help, as Outlook has to go to google to send and fetch.  Also it's a bit unprofessional for my customers to receive an invoice from yahoo, or other account that they aren't familiar with.

I hope the engineers can figure this out before our next invoicing period at the end of June

I appreciate your response and suggestions.  I think the tech I dealt with this morning was going to add me to a list of some sort.  Thanks!