Hi, I have read your attachment, The only way to fix the problem of MailChimp rejecting emails is by using an SMTP server like SendGrid, Amazon SES, MAILGUM ETC. With the SMTP server, you can send many emails per day without any limitation and it's designed for mass mailing for people who have a big list.
I'm an email marketing expert with 5+ years of experience sending mass email and cold emailing. I will open the SMTP server account for sending bulk emails rejected by Mailchimp and send it. I will be responsible for verifying the email list and updating it regularly with professional tools to improve the delivery of emails.
The only way to get high open rate, delivery rate, and conversion rate is by verifying list, segmenting list, updating by removing inactive subscribers, and crafting high converting email copy and I'm good on all these things I mentioned.
Let's discuss further, I'm ready for the work.
Best regard
Betty.