I'm actually struggling with CPA Email Marketing. I set up my system (G Suite + GMass + SendGrid) but there is no cash flow, yet!
I had managed to to launch my initial campaign via GMass (100 emails 65% of them opened) & Sendgrid -linked to GMass- (about 170 emails 14.5% of them opened). A week later, I considered sending a new CPA campaign so as always, I used GMass test tool (gmass.co/inbox) but all the test emails went to Spam (even 1st campaign email copy already validated by this tool and very simple copies without hyperlinks).
To get worse, I sent recently another CPA 100-email batch; and only 7 of them were opened!
Did the repetitive testing with GMass tool (14 email addresses) harm my Gmail reputation and, consequently, my emails deliverability ??
What should I do? Any advice will very appreciated.