SMTP Brouhaha

How can I solve Smtp problem... I have spent a lot, wasted a lot but yet to find a solution for SMTP inboxing office... I tried cracking- Combo VIP group is crap, I tried creating Gsuite no comment... Please give your suggested solution to my problem. Thank you

You can use gmail for smtp , it’s give you more freedom and good inbox quality You have two options for sending emails: using Gmail with an app password or utilizing the Gmail API. Using the Gmail API to send emails is highly beneficial—it’s cost-effective and allows you to send up to 400-800 emails at once from a single SMTP. Additionally, Gmail’s pricing is inexpensive, typically ranging from 0.10 to 0.12 per email. Therefore, it’s the best way to send bulk emails.”

I have a Gsuite I regret paying for... Office is better but still not enough