I have a client I have been working with for some time now, and I write emails for her. She was sending emails from Stan to her audience. But because of better customization, we moved to systeme.io. She used to use systeme.io in the past, but she stopped sending from there in a long while. So, as we were moving back to Systeme, I told her to warm up her domain for better deliverability, but she didn't. So we started sending some engagement emails to her list. I noticed the opened rates were not that high, and all of a sudden, they dropped to less than 4%. Now we have started domain warmup and have sent engagement and value emails for about a week now, but still, there have been no improvements. What do I do, could anyone give me real advice that has helped you 😔