Hey there,
After reviewing your project description its clear that you want to send as many email as you can from your gmail accounts. And you are looking for a solution for increasing the limit.
I'm very experienced with Email Marketing, Email Handling and I used gmail in this way and have sent a lot of emails. So I know everything about it and can give you very proper solution.
Thanks in advance for giving the opportunity to working with you.
Have a good day.
Best Regards,
Serazum Munir.